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Instant Pot Confetti Birthday Cake
Ingredients
  • subheading: Cake:
  • Nonstick cooking spray
  • 1 ½ cups cake flour (see Cook's Note)
  • 3 tablespoons rainbow sprinkles, plus more for decorating
  • 2 ½ teaspoons baking powder
  • ¼ teaspoon baking soda
  • ¾ teaspoon kosher salt
  • 8 tablespoons (1 stick) unsalted butter, at room temperature
  • 1 ½ cups confectioners' sugar
  • 1 teaspoon vanilla extract
  • 1 large egg, at room temperature
  • ½ cup sour cream
  • subheading: Buttercream:
  • 4 ½ cups confectioners' sugar
  • 24 tablespoons (3 sticks) unsalted butter, at room temperature
  • 1 vanilla bean, split
  • 2 to 3 tablespoons heavy cream
Steps
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