Ingredients
For the Cake
- 2½ cups all-purpose flour
- 2 tsp baking powder
- ½ tsp salt
- ¾ cup unsalted butter, softened
- 1¾ cups sugar
- 4 eggs
- 1 tbsp vanilla extract
- 1 cup milk
- ½ cup rainbow sprinkles (jimmies work best)
For the Vanilla Buttercream
- 1 cup unsalted butter, softened
- 3–4 cups powdered sugar
- 2–3 tbsp milk or cream
- 1 tsp vanilla extract
- Extra sprinkles for decorating
Instructions
- Prep the pans
Preheat oven to 350°F (175°C). Grease and line two 8-inch cake pans. - Mix dry ingredients
Whisk flour, baking powder, and salt together. - Cream butter and sugar
Beat butter and sugar until light and fluffy. Add eggs one at a time, then vanilla. - Combine
Alternate adding dry ingredients and milk until smooth. Fold in sprinkles gently. - Bake
Divide batter between pans and bake 25–30 minutes, until a toothpick comes out clean. - Cool completely
Let cakes cool before frosting. - Make buttercream
Beat butter until creamy. Gradually add powdered sugar, vanilla, and milk until fluffy. - Assemble
Frost between layers and around the cake. Finish with extra sprinkles.
Tips
- Use jimmies-style sprinkles to avoid color bleeding.
- For extra vanilla flavor, add vanilla bean paste.
- Chill the cake for 20 minutes before final decorating for cleaner frosting edges.