5 from 1 vote
Funfetti Vanilla Cupcakes
Prep Time
25 mins
These homemade funfetti cupcakes are light, fluffy, and full of sweet vanilla flavor! The vanilla buttercream on top is rich, smooth, and so easy to put together!
Servings: 22 -24 Cupcakes
  • 1 cup butter softened
  • 1 1/2 cups granulated sugar
  • 4 large eggs
  • 2 1/2 cups all-purpose flour
  • 2 Tbsp corn starch
  • 2 1/2 tsp baking powder
  • 1/2 tsp baking soda
  • 3/4 tsp salt
  • 1 cup buttermilk
  • 2 tsp vanilla extract
  • 1/2 cup sour cream
  • 1 cup rainbow jimmies sprinkles
Vanilla Buttercream
  • 2 cups butter softened
  • 6-8 cups powdered sugar
  • 1/2 cup heavy whipping cream
  • 1 Tbsp vanilla extract
  • salt to taste
  • extra sprinkles as a topping
  1. Preheat oven to 350 degrees and line two 12-cup muffin tins with cupcake liners.
  2. With a mixer, cream butter until light and fluffy, about 1-2 minutes. Add in granulated sugar and cream until well combined, about 1 minute. Add in eggs, one at a time, beating well after each addition.
  3. In a separate bowl, sift flour, corn starch, baking powder, baking soda, and salt together.
  4. Alternately, add dry ingredients and buttermilk to the butter mixture, beginning and ending with dry ingredients, stirring until just combined.
  5. Add in vanilla extract and sour cream and mix until combined.
  6. Divide batter evenly between cupcake liners, filling each about 2/3 of the way full.
  7. Bake for 20-22 minutes, or until a toothpick comes out clean. Allow to cool.
Vanilla Buttercream
  1. With a mixer, cream butter until light and fluffy. Add in powdered sugar one cup at a time, beginning with 6 cups powdered sugar.
  2. Add in heavy cream, vanilla extract, and a pinch of salt to off-set the sweetness of the frosting. If the frosting is too thin, add in powdered sugar, 1 cup at a time.
  3. Spread frosting over the cupcakes and top with sprinkles.
  4. Enjoy!