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Valentine's Day Funfetti Sheet Cake

Print Recipe
Soft Funfetti cake with vanilla buttercream - tinted colors for a festive Valentine's Day bake!
Servings 12 Slices
Author Mandy Merriman - Baking with Blondie

Equipment

  • Piping tips: 1M (large star), 1A (large circle), 6B (large french tip), #125 (pedal/ruffle)
  • 9x13 sheet cake pan
  • pink and red gel coloring

Ingredients

Funfetti Cake

  • 3/4 cup buttermilk room temperature
  • 2/3 cup sour cream room temperature
  • 4 large egg whites room temperature
  • 1/3 cup vegetable oil
  • 1 Tablespoon vanilla
  • 1/2 cup valentine's day jimmies sprinkles
  • 1 15.25oz White Box Cake Mix sifted - I used Duncan Hines

Vanilla Buttercream

  • 1 1/2 cup (or three sticks) unsalted butter left out at room temp for 10 minutes
  • 1 pinch salt
  • 1 Tablespoon vanilla
  • 1/2 cup heavy cream
  • 7-9 cups powdered sugar

Extras

Instructions

For the funfetti sheet cake

  • Preheat the oven to 325 degrees, and prep a 9×13 sheet pan/dish with shortening/spray/goop/nonstick. Set aside.
  • In a large bowl, whisk together all the ingredients except for the cake mix and sprinkles. Sift in the cake mix, then gently fold in the sprinkles until combined. Spread into the prepared 9×13 pan and bake for 20-14 minutes. Let cool.

For the buttercream

  • In the bowl of a stand mixer, whip up the butter until it's light and fluffy, about 2 minutes. Add in the salt, vanilla, and heavy cream and whip up again to combine. Add in the powdered sugar and whip up on low speed until combined, then on high speed for 2 minutes to lighten the texture.
  • Fill one piping bag with a piping tip and white buttercream.
    Add a drop of pink to the mixer and whip up - fill up another piping bag with the light soft pink buttercream and another piping tip.
    Add another drop of pink and whip up - fill up another piping bag with the light soft pink buttercream and another piping tip.
    Add a drop or two of red and whip up - fill up another piping bag with the light soft pink buttercream and another piping tip.
  • One by one, pipe on rosettes, swirls, drop stars, and ruffles in a random pattern all over the top of the cake. Sprinkle on the silver dragees! Enjoy!