Funfetti Sheet Cake
This EXTRA LARGE funfetti sheet cake is perfect for a children's birthday party! It serves a large crowd (about 50 people) and is fluffy, delicious, and so festive.
Yield: 40-50 servings
  • 2 cups unsalted butter, softened
  • 4 cups sugar
  • 4 large eggs
  • 5 tsp vanilla extract
  • 1 cup plain yogurt
  • 4½ cups all purpose flour
  • 2 tsp baking soda
  • 1 tsp salt
  • 2 cups whole milk
  • 1 cup rainbow sprinkles
For the buttercream
  • 1 cup unsalted butter, softened to room temperature
  • 4 cups confectioner's sugar
  • 2-3 tbsp heavy cream
  • 2 tsp vanilla extract
  • pinch of salt
  1. Heat oven to 350F.
  2. Grease a 12x18x3-inch baking pan with baking spray. Line with parchment paper and spray again. Set aside.
  3. In the bowl of a stand mixer fitted with the paddle attachment, cream together the butter and sugar until light and fluffy, about 4-5 minutes on medium-high speed. Add in the eggs and vanilla. Mix until combined, about 2-3 minutes. Scrape down the sides of the bowl, then add in the yogurt and mix until combined, about 1-2 minutes.
  4. In a large bowl, whisk together the flour, baking soda, and salt. Add half of the flour mixture to the batter and mix on low speed until just combined. Add in half the milk and mix on low until just combined. Repeat with remaining flour mixture and milk. Using a large rubber spatula or wooden spoon, fold in the sprinkles.
  5. Pour the cake batter into the prepared pan and smooth into an even layer using an offset spatula. Bake for 40-45 minutes, rotating once halfway through, until the center is set and a toothpick inserted in the center comes out clean.
  6. Allow to cool completely in the pan on a wire rack. Turn upside down onto a foam board when ready to frost or frost inside the pan.
  7. To make the buttercream, put the butter in the bowl of a stand mixer fitted with the paddle attachment. Beat until light and creamy, about 2 minutes. Add the powdered sugar, cream, vanilla, and salt. Mix on low for a minute and then increase speed to high. Beat for 3 minutes. Frost cake as desired.
Adapted slightly from Sally's Baking Addiction
Recipe by Joanne Eats Well With Others at