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Funfetti "Quarter" Sheet Cake

Funfetti sheet cake just brings smiling faces your way! It's colorful, it's light, it's fluffy, it's cake, and it's pretty darn great.
5 from 1 vote
Prep Time 15 mins
Cook Time 30 mins
Total Time 45 mins
Course Dessert, Frosting/Buttercream
Cuisine American
Servings 12 servings

Ingredients
  

  • 3/4 cup Cake flour sifted
  • 1/3 cup All-purpose flour sifted
  • 1 Large egg
  • 1/2 cup Unsalted butter softened
  • 1 tsp Vanilla extract
  • 1/4 tsp Kosher salt
  • 1/2 cup Granulated sugar
  • 1/2 tsp Baking powder
  • 1/3 tsp Baking soda
  • 1/4 cup Rainbow sprinkles
  • 1/3 cup Sour cream
  • 1/4 cup Whole milk

American Buttercream

  • 1/2 tsp Almond extract
  • 1/4 tsp Salt
  • 2 cups Powdered sugar sifted
  • 1 tsp Vanilla extract
  • 6 tbsp Unsalted butter softened

Instructions
 

Funfetti Quarter Size Sheet Cake

  • Preheat the oven to 350 degrees F. Line a quarter size sheet pan with parchment paper.
  • Place the all-purpose flour, cake flour, baking soda, baking powder, and kosher salt into a medium sized bowl. Whisk and set aside.
  • Add unsalted butter and granulated sugar in a bowl of an electric mixer. Mix the ingredients on medium speed until the mixture is while incorporated and fluffy. (Roughly 1-2 minutes) 
  • Place the egg, sour cream, milk, and vanilla extract in a measuring cup. Whisk together and set aside. Stir in half of the flour mixture and half of the liquid mixture. Once fully incorporated. Turn off the mixer and add the remaining flour mixture and liquid mixture. Beat on medium speed into the batter is well mixed. Add the sprinkles
  • Once added, stir the cake batter by hand with a spatula. Transfer the cake batter into the lined sheet pan.
  • Bake for 25 to 30 minutes, or until the inserted toothpick comes out clean from the center of the cake pan. Cool the mini funfetti cake completely, before frosting.
  • To make mini funfetti cakes, once the cakes have cooled using a 2.5 or 3 inch circle cookie cutter. Cut out cicles. Once completed decorate in buttercream and sprinkles.

American Buttercream

  • Place the room temperature butter in the electric mix. Beat on medium speed for 2 minutes.
  • Add the sifted powdered sugar in small increments. Beat together, and repeat until all powdered sugar is incorporated. (To help with over thickens of the frosting add the 1-2 tablespoons of milk/heavy cream.) Stir in the almond and vanilla extract until combined. 
Keyword funfetti quarter sheet cake, Funfetti sheet cake