Confetti Cake, or Party Party Cake
 
Ingredients
  • 1½ cups (345 grams) unsalted butter, softened
  • 2 cups (370 grams) sugar
  • 5 large eggs, separated
  • 2 cups (280 grams) all-purpose flour
  • 1 teaspoon (6 grams) baking soda
  • ½ teaspoon (1.5 grams) kosher salt
  • 1 cup whole buttermilk
  • 1 teaspoon vanilla extract
  • ½ cup multicolored jimmies sprinkles
Instructions
  1. Preheat oven to 350°. Spray 3 (9-inch) round cake pans with baking spray with flour. Line bottom of pans with parchment paper, and spray pans again.
  2. In a large bowl, beat butter and sugar with a mixer at medium speed until fluffy, 3 to 4 minutes, stopping to scrape sides of bowl. Add egg yolks, one at a time, beating well after each addition.
  3. In a medium bowl, stir together flour, baking soda, and salt. Gradually add flour mixture to butter mixture alternately with buttermilk, beginning and ending with flour mixture, beating just until combined after each addition. Stir in vanilla and sprinkles.
  4. In another medium bowl, beat egg whites with a mixer at high speed until stiff peaks form. Gently fold egg whites into batter, one-third at a time. Divide batter among prepared pans.
  5. Bake until a wooden pick inserted in center comes out clean, about 20 minutes. Let cool in pans for 10 minutes. Remove from pans, and let cool completely on wire racks. Spread Sweet Cream Frosting between layers and on top of cake. Very lightly frost sides of cake.
Recipe by The Ribbon in My Journal - Phyllis Hoffman DePiano at https://www.theribboninmyjournal.com/big-sisters-birthday-a-sisters-tale/