A cheerful and moist Funfetti Layer Cake filled with colorful sprinkles and frosted with creamy vanilla buttercream — perfect for birthdays, parties, or any celebration.
2 ½ cups all-purpose flour
2 ½ tsp baking powder
½ tsp baking soda
½ tsp salt
¾ cup unsalted butter, room temperature
1 ¾ cups granulated sugar
4 large egg whites, room temperature
1 tbsp vanilla extract
1 cup buttermilk (or whole milk)
½ cup rainbow sprinkles (jimmies)
Buttercream Frosting:
1 cup unsalted butter, room temperature
3 ½–4 cups powdered sugar, sifted
2–3 tbsp milk or cream
1 tbsp vanilla extract
Pinch of salt
.
Preheat oven to 350°F (175°C). Grease and line three 8-inch round pans.
In a bowl, whisk flour, baking powder, baking soda, and salt.
Cream butter and sugar until light and fluffy (3–4 mins).
Beat in egg whites one at a time. Add vanilla.
Alternate adding dry ingredients and milk, starting and ending with flour.
Fold in sprinkles gently.
Divide batter evenly into pans. Bake 25–28 mins or until a toothpick comes out clean.
Cool in pans for 10 mins, then transfer to racks to cool completely.
For frosting: beat butter until creamy. Add sugar, vanilla, salt, and milk until smooth and fluffy.
Assemble and frost the cake. Decorate with extra sprinkles as desired.
Pinch of salt
Use cake flour for a softer crumb. To make ahead, wrap cooled layers and freeze for up to 2 months. Substitute non-dairy milk and butter for a vegan version.