Chocolate Cake with Whipped Peanut Butter Buttercream
Okay, friends. The wait is over.
Here we go…
I’m finally sharing my cake recipes.
Yep.
Luscious chocolate cake layers made with my sure-fire cake recipe, and the most amazing peanut butter buttercream you can ever imagine. This cake is perfect for the ultimate peanut butter chocolate lover in your life!
It’s been a long time coming to this. I’ve had so much anxiety about this, really. I’m sure most of you have heard my story leading up to this moment. I used to share my recipes all the time; mostly foodie recipes. But when it came to my frosting recipes, I let a couple out, slowly, and things seemed to be going well.
Until one of my treasured original buttercream recipes was stolen, used, published, praised, without my name on it anywhere. I’m talking the EXACT RECIPE measurements and directions. Fun stuff, right? I love when others try my recipes, seriously, I do. But I feel like there’s a pretty bold line between making the recipe for fun to enjoy and share, and using it to get gain (cookbooks, blogland fame, bakeries, etc) without giving me a nod for my time in the kitchen developing said original recipes.
I’ve gotten a lot of flack for sharing all my cakes on my Instagram starting this year, without sharing the recipes. And I’ve been pretty open about why I haven’t shared them so far. Some bigger blogger or bakery will find it, use it, claim it as their own, publish it, and because I felt like I was lesser known, I will fade into the background while the recipe becomes theirs. Also, I was having an identity crisis, thinking maybe I’d open a bakery, or publish an exclusive cookbook someday, and didn’t want my recipes to get out yet.
Until now.
I did an Instagram LIVE a couple days ago and spilled all the beans. Recipes, techniques, anything you wanted to learn about my baking. It was a total blast, and I was so humbled by how well my recipe “Secrets” were received. Thank you so much, you guys. I had so much anxiety about it beforehand, and you all have been amazing.
I’d like to share my recipes with you on a more regular basis. I promise they are my treasures. They work. They are crazy delicious in countless ways. And they are all mine – I haven’t copied or adapted them from another baker’s blog, another cake blog, etc. This is me.
Sure, I’ll still make cakes for people, but will limit my orders to a couple a week while I baby this blog back into life. Lots of new things are headed this way for my piece of Baking with Blondie land, but for now, I thought I’d drop a cake & buttercream recipe here and there to keep us all happy, eh? 🙂
First, lets talk about the elephant in the room.
When you look at my recipe list of ingredients below, you’ll notice something that may make you run in a different direction and (to some) make me lose all credibility as a baker.
“cake mix”
HOLD THE PHONE.
Baking with Blondie uses a cake mix!? FREAKING WHAT THE HECK IS SHE THINKING.
FROM SCRATCH IS BEST, right?
Well, sometimes.
If you are a hard-core “I’m-never-going-to-use-a-cake-mix” person, have an open mind with me here for a second.
Please still love me! haha
I hate the typical back-of-the-box recipe. You add in a couple eggs, oil, and call it good. Light, too airy, dry, and not the best texture.
Unless you add in some sour cream, buttermilk, extra egg whites, and good quality vanilla…
magic happens, you guys.
I’ve tried my recipes next to some of the most praised cake recipes out there (Sweetapolita, cough, love her, but everyone uses her recipe, or adaptations of it, and quite frankly… there’s an easier and tastier way to get the “made from scratch” taste without having to use a bazillion egg whites and extra ingredients).
Welcome to my sure-fire cake mix recipe formula:
1. CAKE MIX: I use Duncan Hines. I’ve tried my method with Betty Crocker, Pillsbury, etc, and it just wasn’t the same. Sift the cake mix before using it to get out all the pieces that have clumped together.
2. SOUR CREAM: I use full-fat sour cream in my cakes, and always go for the Darigold brand (can be found mostly everywhere here in the states, but I usually get mine in the large container from Costco).
3. BUTTERMILK: Yep. This is the stinkiest stuff you’ll ever lay nose on, but dang, it sure makes a mean cake. You can use the real stuff from the milk section, or you can add vinegar or lemon juice to whole milk and wait for it to curdle before using it (about 5 minutes).
4. VANILLA: Use the best quality vanilla you can find. I get it, vanilla is expensive. But I’m telling you, the taste of the better stuff is everything.
5. EGG WHITES: For my white cakes and lemon cakes, I use 4 egg whites, and zero egg yolks. For my red velvet and chocolate, I do 1 egg white and 4 whole eggs. More on that later.
6: OIL: I use vegetable oil. I’ve tried using grapeseed oil (if you want to pay an arm and a leg, ugh), or canola oil, and it just wasn’t the same. Olive oil is way too strong of a taste. Stick with the veggie oil, or I’ve also used melted butter and it’s worked fine.
I add in other things for flavor enhancement, but these are the core ingredients to all my cake recipes.
See?
Still want to dog on me for using a cake mix? There’s a difference between using a cake mix, or USING your cake mix as an ingredient to compliment the other 5 ingredients you’re going to add to it. Still with me? haha.
So, if you’re in doubt, I promise you – I’ve fed my cakes to TV producers, die-hard cake-from-scratch lovers, and the most skeptical pastry chefs I know, and they have absolutely raved about my cakes and have begged for the recipes the second they take a first bite. The cakes I’ve made using these 5 ingredients plus the cake mix have been raved as “the best cake I’ve ever had” almost every time I serve it to anyone. I promise, there’s a reason I keep using these recipes!
So welcome to my new cake revolution – using a cake mix in my recipes.
Chocolate Peanut Butter Cake
makes 3x 6″ cake rounds
or 2x 8″ cake rounds (I usually double this recipe to make my medium cake)
ingredients:
chocolate cake:
1 Duncan Hines Dark Chocolate Cake Mix
2/3 Cup Sour Cream
1 Cup Buttermilk
3 eggs + 1 egg white
1-2 Tablespoons vanilla
1/3 Cup vegetable oil
1/3 Cup vegetable oil
1/2 Cup quality cocoa powder
1/2 Cup mini chocolate chips
(I toss in 1/4 C sifted cake flour to my batter here for our high altitude)
optional: 1 teaspoon nescafe
chocolate ganache:
1/2 cup semi-sweet chocolate chips
1/2 cup heavy cream (I love the Darigold brand)
reeses peanut butter cups
ghiradelli mini chocolate chips
method:
chocolate cake:
1. Preheat the oven to 325. In a large bowl, sift cake mix and set aside.
2. In a medium bowl, whisk together sour cream, oil, buttermilk, eggs plus egg white, vanilla, until mixture is uniform throughout.
3. Add in the cocoa, flour, chocolate chips, and sifted cake mix and whisk by hand until just combined (don’t overmix).
4. Divide cake batter into prepared baking pans. Spread with a spatula in an even layer.
5. Bake for 25-27 minutes until centers come out completely cooked, but not overbaked.
6. Let cool in baking pans for 5 minutes, then turn out onto a wire cooling rack.
assembly:
1. I usually wrap and freeze my cake layers before frosting – working with cool cake layers is much easier.
2. Stack and frost cake layers with peanut butter buttercream. Crumb coat and refrigerate for at least 10-15 minutes. Frost the final cake layer, alternating between a piping bag filled with cocoa buttercream and another with the peanut butter buttercream in horizontal stripes, smoothing it out with a cake scraper.
3. While the frosting is still wet, wrap the bottom with the mini chocolate chips. Place back in the fridge to chill while making the ganache.
(make the ganache:
1. Microwave the chocolate and heavy cream together for about 1 minute until you reach the desired consistency (I prefer mine more thin than these photos, but I made it during a LIVE video and wasn’t about to fuss over it more than I already did, haha). Place in a squeeze bottle. You want it to be cooled, but not cold, if that makes sense).
4. Add the drip to the cake, refrigerate again to make sure the frosting isn’t going to slide off the top, and then alternate between piping the peanut butter buttercream swirls and whole reeses cups on top. I usually add a little bit of chocolate chips on top, too!
Enjoy!
I’m curious. Do you always use 6″ pans and when you use the above recipe does it make 2 layers like the box says or 3 like you use when decorating cakes?
Hi Linda! I usually do 3x 6″ pans, but if I need a bigger cake, I’ll do 2x 8″ pans and then double the recipe.
Hello! I can’t wait to try this recipe! In the original recipe you mention that you use 3 5” round pans, but in your reply to someone, you said 3 6” round pans. I just wanted to make sure I buy the right size pans for this recipe, so I wanted to double check with you! Thank you for sharing your recipe with us! 🙂
Hi Andrea! Thanks for catching that! 5 inch or 6 inch pans should work just the same for this recipe. So excited for you to make this! ♥️
Thank you for such a quick response! 🙂 I like really tall cakes, so I think I’ll buy 5” rounds for this one! I always try a new cake recipe for my birthday every August, and this one might be my favorite yet – hopefully I can pull it off as well as you have! Thank you so much again!
That sounds like a good plan! You will LOVE it. I love the idea of making my own bday cake every year. You are amazing!
Hey your cakes are amazing!😀 just had a question though. I have 6 x 2 pans. Will the outcome of the cake be affected with any of the recipes?
Thanks so much😀
Hi Franca! I would make sure the batter is split evenly between three of them, and you should be fine.
I’m doing a 9″ cake does that mean I double the recipe?
Hi Thanya! You wouldn’t have to double the recipe. However, you will probably only end up with TWO layers of 8-9″ cakes.
Thanks for sharing! I’m very excited to try your recipe. I missed your Instagram live, but am wondering if your book is still in the works?
Hi Myriam! Yes, still very much in the works.
Thanks so much for sharing your experience, recipes and tips! I am a seasoned Baker and use cake mixes with added ingredients. 😉 Your method is new to me and I can’t wait to try it!
This is a beautiful cake and delicious I’m sure!
Pat
Thanks Pat! I feel like people usually get out the pitchforks, so it’s great to see some support in this method! 🙂
If one box of cake mix makes 2 8″ layers on it’s own why woukd you need to double the recipe? That sounds like a lot of cake batter. This cake looks amazing!
Hi Vicki! Usually I would double it because most standard cakes are at least three layers. The two are plenty, but it won’t be very tall at all. I guess I’m just so used to very tall cakes!
Hi Mandy! How long would you recommend baking the 8″ cakes? Thanks!
Hi Tessa! I would start with 25 up to 30 min, depending on your oven.
Thanks for sharing the recipe! If I am honest, I am a bit shocked about the box cake mix from you! I don’t mind doctoring up cake box mixes but for sure I have found that nothing truly beats from-scratch. I have been following your IG and am excited about your recipe book coming out. Will you have box-cake recipes on there or only scratch made or a bit of both?? Thanks Mandy! 🙂
Hi Clara! Why does it shock you? A ton of well known bakeries use the same exact method (some are nationally ranked and celebrated for their cupcakes and cakes). I’ve made several scratch recipes that taste dry and absolutely awful. So I can’t say in my personal opinion that nothing beats from scratch! I feel like it totally depends on the baker, and I love the saying “you do you.” That said, my Cakebook will be doctored cake recipes. I don’t judge the baker for their recipe method. I celebrate them taking the time to create and share that love of baking with others.
I was just wondering if you have stored the buttercream in the fridge before using it what is the best methid to get it creamy again without lumps or grainy bits. You are awesome by the way. Lice all the from Oz.xx
Love all the way… 😐
🙂
Hi Amy! I store buttercream in the fridge all the time. I wrap it in plastic wrap a couple times and store it in the fridge door. Before using it again, I let it sit in room temperature for a while, then whip it up in the stand mixer again to get the original texture/consistency.
Wow I’m so intrigged. I’m in New Zealand. And when I make cakes to decorate my main issue is that the cake is to soft so icing isn’t easy. I don’t have a recipe that is suitable for buttercream. And who doesn’t love a box mix. I have never considered changing up the box mix like you have here. I’m definitely going to give this a go. Thank-you for sharing 😊
Hi Stacey! Thank you so much! I’ll be sharing my basic buttercream recipes on here very soon, so hopefully that helps lots! 🙂
Hi Mandy, I know someone already asked a similar question, but do you use the buttercream at room temperature or straight from the fridge? The cakes I make, I have always had the butter and buttermilk sit out to room temp, but am excited to try this recipe and want to make sure I get it right! Thanks!
Hi Tessa! I usually bake and use my buttercream fresh, so the only temperature it has is from the slightly cold butter and cold heavy cream. You want your buttercream to be cold – the warmer it gets, the more air bubbles it gets and the more the buttercream misbehaves.
Thank you for sharing! I can’t wait to try it since I usually use the doctored mixes for a vanilla base since I have not been able to find a good recipe that doesn’t end up dry ir taste like cornbread.
I have experienced my chocolate scratch recipe the bottom layers end up getting wider after stacking. Guess they are too soft so the weight of the cake smashes it down.
Hi Debra! This will rock your world – it’s always fun to bake from scratch, but these doctored cake mix recipes seriously have everyone fooled into thinking they are from scratch, haha! I love it. Yes – that means there’s a ton of weight smashing that poor little bottom down. Eek!
Love your cakes! So happy you left us the recipe! Box cake SAVES my life haha! Can’t wait to try it, your decorating is AMAZING!
Hi Sam! Good to hear. Box mixes get such a bad rap – for a good reason. By themselves they aren’t anything to write home about. However, with a few extra ingredients, things come together pretty well, I must say! Thank you so much!
Hi!! Longtime Instagram follower, first time blog commenter! I am SO glad to see this recipe uses a box mix. I have had a hard time finding good “doctored” recipes that work. I’m so excited to try this recipe! Thanks so much for sharing!
Hi Lala! Thanks so much for being such an amazing part of this BwB community! You are simply the best! Happy to hear you understand why using a doctored box mix isn’t rebellion against cake land. haha. Can’t wait to hear how you love it! 🙂
Hi Mandy!
Thank you for sharing! I love that you are so practical in your approach to baking. It makes me think I can do it! I know you have probably mentioned this before but I am a new follower, so sorry for a repeat question. Where do you get your cake turntable to help you decorate?
Hi Jess! I’m so happy you found me and are excited to bake – you’ve got this! I love my Ateco metal turntable! It’s here: https://www.amazon.com/shop/bakingwithblondie?ref=ac_inf_hm_vp
Hi Mandy,
Thank you for sharing your awesome “trick”! I was just wondering tho, would the cake be still sweet after adding all those extra ingredients? I’d like to make the cake but I’m planning to frost it with Oreo buttercream.
I’m from Australia so it’s a bit hard to get my hands on Duncan Hines so I’ll be using Betty Crocker’s Chocolate fudge cake mix 😬 I hope it works alright.
Hi Azareen! It will be plenty sweet – the extra ingredients are huge with helping with the overall texture, mostly. Oreo buttercream would be AMAZING with this chocolate cake. Betty Crocker should work fine. Let me know how it goes! I’d love to hear how my recipes work in different countries and altitudes, of course!
Hi Mandy! I’m also pretty shocked to see you use out-of-the-box mix, but it obviously works for you and that’s amazing! I had no idea other bakers did this!. My question is though, what if they discontinue, or change their recipe? Are you not concerned that your cakes are reliant on another company’s product?
Hi Maria! Yes, it’s a pretty common practice (especially in some well known bakeries). The recipe is so fool proof, that if you switch to a different brand, it’s not going to ruin anything. I just prefer the texture and taste of doctored cake mix recipes with Duncan Hines. They’re not reliant on another company’s product at all. We all bake differently, there’s no superior way to create cakes, and that’s what I love about it.
Trying this tomorrow as a thank you for our primary music leader who is moving out of state. Just a quick question, do you use your full recipe for both frostings for this cake? Or do you half the chocolate since it’s just alternating with the peanut butter on the outside?
Hi Katie! You are so sweet to make this for them! Primary music teachers are the best 😍. I use half the cocoa and Pb. Or, you can use the cocoa buttercream in between the layers, too (alternate the PB and Cocoa like a Target, and it will look really cool to slice into).
I can’t wait to try this!!
I do have a question that I’m sure would seem self-explanatory. But, do you sift the cocoa powder in with the cake mix? I’ve read and re-read the recipe and I cannot for the life of me find where it says the cocoa powder has to go!
Hi Jessi! Yes! Add the cocoa powder in with the mix for sure. Sorry about that!
Hello Mandy!
I just have to say that reading this post has truly made my day, and I am so RELIEVED to learn that I am not the only one who uses doctored cake mixes!! I honestly used to have so much anxiety that someone would learn my “secret” and think less of me for it. I share your opinions on scratch recipes- I have yet to find any that are even half as good as my doctored mixes. I have also received countless compliments on my doctored mixes for several years now. I think a lot of people just assume “from scratch” is best, but they don’t even realize they like the mix version better! Something else we have in common- I also exclusively use Duncan Hines! So thank you for sharing your passion. I can truly relate to you in so many ways, and it has been incredibly inspiring. ☺️
Megan, this means the world to me. Like seriously. People like you are the reason I keep going with this. Thank you, thank you, thank you. ♥️♥️♥️
OMW Megan, I feel like you took the words right out of my mouth, I have always been so afraid of people learning that my cakes and cupcakes aren’t from scratch recipes, they all always rave about the texture and taste. I have also tried most of every recipe available to human kind and I don’t get the same results, I’m also tired of wasting ingredients. I TOTALL LOVE THAT I AM NOT IN THIS ALONE, THANK YOU THANK YOU MANDY FOR THIS AWESOME BLOG AND HONESTY. YOU HAVE A FOLLOWER FOR LIFE!!! For the person that stole your recipe SHAME ON THEM, KARMA is all I am going to say. I am from South African and unfortunately we don’t get Duncan Hines but we do get Pillsbury and it bakes up really awesome, I am definitely gonna try your recipe and will let you know how it goes awesome lady!!!
Hi Chantel! Thank you, thank you, thank you. Some people believe scratch is best, and some believe doctored cake mixes are best. I don’t think either is superior over the other – it’s just whatever works best for you! I LOVE that you do this – it makes baking so much more accessible for everyone! And I totally agree – I’ve tried some scratch recipes that have been total zero out of tens (even by well-known bakers!). It’s insane. I am SO HAPPY you found me! Cake friends for life, for sure 🙂 .
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Hello! Just a little curious I noticed that in your explanation of what ingredients you add to your cake mix you mentioned you use 4 whole eggs and 1 egg white but in the list of ingredients you wrote 3 whole eggs and 1 egg white. Do you use 3 whole eggs or 4? I tried this recipe yesterday using the 3 whole eggs and 1 egg white and my cake turned out a little dry so I just wanted to make sure. Or did I perhaps do something wrong?
Hi Cinthya! Three eggs and one white for this one! Thanks for catching that – if it’s dry, try baking it a little less next time (dry cakes come from overbaking). ♥️
Hi I live in New Zealand so you can’t buy that cake mix here is their any other brands I could use or not ?😀
Hi Tala! You can use Betty Crocker or Pillsbury, too. 👍🏻
I don’t know if this question has been asked already…what kind of piping bags do you use to make the stripes? Do you use a tip? And what bags and tips do you use to pipe the peanut butter buttercream on the top? Thanks I love your cakes so much!
Hi Erika! I just use Wilton 12” bags and then snip the tip with scissors. For the buttercream swirls on top I used the Wilton 1M tip. ☺️
hello, I just tried this recipe and have to say I completely LOVE IT!!!! I had to use Betty Crocker as Duncan Hines isn’t available where I live. I have to say I have tried countless chocolate cake recipes and I mean a tonne and I have never been truly happy with any of my from scratch recipes. I have to agree they always come out dry and I have never felt comfortable with chocolate cake for this reason. Today, I made this chocolate cake recipe and used Swiss Meringue buttercream and it is BY FAR the best chocolate cake recipe I have made. I will be going back to this recipe many times. Thank you for sharing. I think there is guilt for me personally in using a “box mix” but as you said its just another ingredient and all the other components really elevate this cake!! guilt be gone!! at the end of the day all we really want is something that tastes good and that people will be happy with. Thank you thank you thank you from the very bottom of my Sweet Bee Heart!!!
Hi Lori! This makes me so happy, thanks for letting me know. 🙂
Mandy – Your cakes are absolutely stunning and you inspire those of us who are not artistically inclined and give us something to strive for. One day, I am convinced that I’ll be able to get to your beautifully perfect smooth surfaces and edges (at least I can dream!) Thank you for sharing your recipe and your tips. I’m forever looking for a perfect cake mix recipe because…well, why not?!? I’m certain that yours will be the one.
YOU are amazing!
Nancy KV
Hi Nancy! Thank you so so so much, friend! This is very sweet – and yes, you’ll get those edges soon enough!
This cake looks amazing! Do I just need to make one batch of each buttercream flavor? Will that be enough to cover my cake if I’m doing 3, 6in cakes? I always end up with not enough or too much buttercream when making my cakes. I can’t wait to make this one!! Thank you!
Hi Mikayla! One batch of each should be plenty.
Hello- I love your cake designs and try to make cakes from scratch when I have time….but my go-to is a doctored recipe too! I am going to try your method this week but I use buttermilk like you but I add a box of corresponding pudding flavor. It stays super moist and people can’t believe when I tell them that it is those simple tweaks to a box mix. I am a busy mom who just wants to make great tasting, pretty treats for family and friends, if using a doctored box mix allows me to spend MORE time with said family and friends, why not?!
Hi Jacky! Yeah! Thank you so much! 🙂
Hi, I can’t wait to try this recipe! My sister has asked me to make a chocolate cake for my nephew, I’d love to try this recipe. She wants an 8 in 3 layer cake. Any thoughts on how I would convert the recipe to ensure I have enough batter? Looking to make a taller cake.
Hi Sarah! The cake is pretty tall as a 3x 6″ rounds cake. To make it 8″, you would probably only get two layers out of this recipe. You can either go with the 6″ cake, or double the recipe and have an extra 8″ cake round. 🙂
Hi, this cake looks dreamy and I will make it for my daughter’s bday in December. I’m looking for a white cake recipe but can’t seem to find it on your site. Could you direct me to it? Or could I use this one with white cake mix (of course) and the egg whites you list in the post? Thanks for the help. I want to make it for a co-worker’s 25th anniversary and she loves white cake.
Hi Maria! I just posted one last week. Go to my MENU bars, then click on RECIPES, then CAKES, and you should see it there. Thanks!
Hello! I want to use this recipe for cupcakes for my sons class party. Would I bake them the same amount of time as the cake? Would you recommend making them the day before or the day of? Love your work!
Hi Jennifer! I would change the baking time to 12-15 min. Day before or day or should be fine. ☺️
Hi Mandy,
Do you use regular cocoa powder or Ruth has processed ?
What’s a good brand of cocoa for this recipe
Love
Sarah
Hi Sarah! I use Hersheys or Ghirardelli.
Hi Sarah! I use Ghirardelli, Hersheys Dark, and sometimes Nestle.
I am so excited to try this recipe!! I can only find Duncan Hines Devil’s Food Cake Mix or Duncan Hines Dark Chocolate Fudge in my stores. Would either of those work the same? Thanks!
Hi Meghan! Thank you! That should work just fine. I love the Dark Chocolate Fudge mix from Duncan Hines.
What size decorating tip do you use to make the swirls in between the Reece cups on top of the cake?
Hi Tracy! I usually use the Wilton 1M piping tip. 🙂
Can’t wait to try. Just wondering why the 3 whole eggs plus 1 egg white?
Hi Holly! I feel like the extra egg white gives it a little something.
I can’t wait to try this recipe! Do you know how many cupcakes one batch will make? I’m making cupcakes for my nephews birthday party and just want to make sure I have enough or if I will need to double it.
Thanks so much ♥️☺️
Hi Samantha! Yes! Usually it makes exactly 24 cupcakes.
Hi Samantha! 24 cupcakes per recipe.
Will this work with 9 inch cake rounds? Do i need to change the recipe at all?
Hi Erica, yes! 2 9″ rounds.
So, did I read that right? If I’m using 8″ cake pans I should double the recipe and use 2 of the 8″ cake pans? I just found out about you/your site/your book today and super excited to try your recipe and I’m thinking I might order your book too! I’m making a birthday cake for my son in a few weeks and he wants chocolate and the picture he picked from Pinterest when we were browsing together is not a skinny or tall cake, just a basic looking round cake with fondant and Star Wars themed. Any advise would be appreciated! Thanks.
Hi Casey! Yes, double the recipe and use two 8″ pans. Good luck!
Hi there!
I’m just wondering about can pan size supu I use three 6×3 deep pans or 6×2 deep pans?
And same for the 8” .. is the depth 2” or 3”?
Thank you!
I use three 6″
I would like recipe for peanut Butter frosting?
It should be right here 🙂
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