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Homemade Funfetti Cake and Buttercream Frosting Recipe

This Homemade Funfetti Cake and Buttercream Frosting is the best I have EVER made!  It is so light and fluffy that you’ll want to eat it by the spoonful.  Seriously, it’s that good.
Prep Time35 minutes
Total Time35 minutes
Course: Dessert
Cuisine: American
Keyword: buttercream icing, Cake, cake recipe, homemade cake
Servings: 12
Calories: 562kcal

Equipment

  • 9 inch baking pan
  • Medium Mixing Bowl
  • Large Mixing Bowl
  • Whisk
  • Aluminum Foil
  • Mixing Bowl

Ingredients

Homemade Funfetti Cake

  • 1⅔ cups all-purpose flour
  • ½ teaspoon baking powder
  • ¼ teaspoon baking soda
  • ½ teaspoon salt
  • ¾ cup sugar
  • ¼ cup light brown sugar
  • ½ cup unsalted butter 1 stick, melted
  • 1 large egg
  • ¼ cup sour cream
  • ¾ cup milk
  • 1 Tablespoon vanilla extract
  • ⅔ cup sprinkles (not nonpareils)

Vanilla Buttercream Frosting

  • 1 cup unsalted butter 2 sticks, softened to room temperature
  • 4 cups powdered sugar
  • ¼ cup half-and-half or heavy cream
  • 2½ teaspoons vanilla extract
  • dash of salt

Instructions

Homemade Funfetti Cake

  • Preheat oven to 350 degrees.  Spray a 9-inch baking pan (round or square) with nonstick cooking spray.  Set aside.
  •  In a medium bowl, mix together flour, baking powder, baking soda and salt.  Set aside.
  • In a large bowl, melt butter in the microwave.  Whisk in the sugars getting out all lumps (mixture will be gritty).  Whisk in egg, sour cream, milk and vanilla until combined.
  • Slowly mix in dry ingredients until no lumps remain.  Stir in sprinkles, but don't overmix to avoid sprinkles bleeding their color.
  • Pour batter into prepared cake pan.  Bake for 20 minutes. Remove from oven and cover loosely will aluminum foil.  Bake for 13-17 more minutes or until a toothpick comes out clean.  Cool completely.

Frosting

  • Beat softened butter on medium speed for three minutes, until smooth and creamy.
  • Add powdered sugar, half and half, vanilla extract and a dash of salt.  Continue to beat frosting on high for 3 minutes.
  • Add more or less powdered sugar to reach desired consistency.  Frost cool cake as desired and top with sprinkles.

Notes

The homemade version of this funfetti birthday cake stores perfectly in a cake airtight container and store at room temperature.

Nutrition

Calories: 562kcal | Carbohydrates: 80g | Protein: 3g | Fat: 26g | Saturated Fat: 16g | Trans Fat: 1g | Cholesterol: 81mg | Sodium: 161mg | Potassium: 74mg | Fiber: 1g | Sugar: 65g | Vitamin A: 801IU | Vitamin C: 1mg | Calcium: 54mg | Iron: 1mg