Ingredients

The following ingredients have 4 Servings
  • 3 cups all-purpose flour (plus extra for dusting cake pans)
  • 2 teaspoons baking powder
  • 1 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1 cup unsalted butter (room temperature)
  • 1 cup granulated sugar
  • 4 egg whites (room temperature)
  • 2 teaspoons clear vanilla extract
  • 1 ½ cups buttermilk or whole milk
  • red and blue food gel coloring (1 drop of each)
  • 2 cups unsalted butter (room temperature)
  • 6-8 cups powdered sugar
  • 2 teaspoons vanilla extract
  • 1/4 cup heavy whipping cream
  • 1/2 teaspoon salt
  • 1 cup red, white and blue sprinkles

Instruction

  • Preheat the oven to 350°. Grease three 8 or 9 inch cake pans with butter or shortening and dust with flour. Set aside.
  • Start with making the cake batter. In a medium bowl, whisk together the flour, baking powder, baking soda, and salt until well combined.
  • In a separate large bowl, cream together the butter and sugar with an electric hand mixer on medium speed until the mixture is light and fluffy.
  • Add the egg whites and vanilla extract, and continue beating on medium speed until mixed.
  • Pour in about a third of the dry ingredients to the wet ingredients, and beat on low speed until just combined.
  • Add the rest of the dry ingredients along with the buttermilk, and fold together until barely combined.
  • Divide the batter evenly between 3 small bowls. A digital scale will make this much easier than just eyeballing it.
  • Add about 1/8 teaspoon (or a drop) of red gel food coloring and blue gel food coloring to two separate bowls of batter, and stir until the colors are well mixed.
  • Pour each bowl of batter into the three cake tins. Bake in the preheated oven for 25 minutes, or until a toothpick inserted into the middle of the cakes comes out clean. Rest the cakes on a cooling rack until they reach room temperature.