Vanilla Confetti Birthday Cake – Simmer + Sauce

Ingredients

• For the Cake:
• 3 1/4 cups sifted cake flour
• 1 tablespoon baking powder
• 3/4 teaspoon salt
• 1 cup unsalted butter, softened
• 1 1/2 cups sugar
• 3 whole eggs
• 2 egg yolks
• 2 teaspoons vanilla extract
• 1 1/2 cups milk
• 1/3 cup rainbow sprinkles
• For the Frosting:
• 1/2 cup unsalted butter, room temperature
• 4 cups Confectioners' sugar
• 1 1/2 teaspoons vanilla extract
• 4 tablespoons milk
• 1/4-1/3 cup rainbow sprinkles