Christmas Grinch Pistachio Sheet Cake with pistachio cake layers, pistachio "Grinch fur" buttercream, and matching hearts and snowflake sprinkles.
Servings 12square slices
Author Mandy Merriman - Baking with Blondie
Equipment
Wilton 21 or 24 piping tip (small star tip)
scallop cake scraper that can fit inside the 9x13 sheet pan
9x13 dish
Ingredients
Pistachio Sheet Cake
1 cupbuttermilk room temperature
2/3cupsour cream room temperature
3egg whites room temperature
1whole eggroom temperature
1/3cup vegetable oil
1Tablespoonvanilla
13.4ozBox Pistachio Pudding Mix I used JELL-O Brand
115.25ozBox White Cake Mix I used Duncan Hines
Pistachio Buttercream
3sticks (or 1 1/2 cup) Unsalted Butter left out at room temperature for 10 minutes
1pinchsalt
1Tablespoonvanilla
13.4ozBox Pistachio Pudding Mix (sifted so the pistachio bits are OUT)
2/3cupheavy cream yes, that's correct - the pudding soaks up the heavy cream really fast.
7-8cupspowdered sugar
1-2drops green gel coloring for the "grinch hair" border
Garnishes/Extras
heart sprinkles
snowflake sprinkles
silver drageesremove before eating if desired
Instructions
For the Pistachio Sheet Cake
Preheat the oven to 325 degrees, then prep a 9x13 pan with shortening or nonstick spray. Set aside.
In a large bowl, whisk up all the cake ingredients except for the cake mix. Sift in the cake mix and gently stir to combine. Spread into the prepared dish and bake for 25-27 minutes until the center is baked through. Set aside to cool completely.
For the Pistachio Buttercream
Whip up the butter until it's light and fluffy, then add in the salt, vanilla, pistachio mix (sifted so the pistachio nut bits are out), and heavy cream. Whip up for 1 minute, then add in the powdered sugar and whip up on high speed until it's light and fluffy. Add in a touch more heavy cream if needed. Reserve 2 cups of buttercream and tint the reserved buttercream a deeper shade of green for the "grinch hair" border.
Assembly/Decoration
Spread on the light green buttercream onto the baked/cooled cake, then use a scalloped cake comb to create the textured pattern (drag it from one end to the other). Pipe (using the darker green) the buttercream, using the 21 or 24 small start tip, into a "hair" border. Add on the hearts and snowflake sprinkles, then add on the silver dragees if using. Enjoy!