Confetti Sprinkle Cupcakes

Bahan-bahan (14 porsi)

• 1 and 3/4 cups (207g) cake flour (spooned & leveled)*
• 3/4 teaspoon baking powder
• 1/4 teaspoon baking soda
• 1/4 teaspoon salt
• 1/2 cup (8 Tbsp; 113g) unsalted butter, softened to room temperature
• 1 cup (200g) granulated sugar
• 3 large egg whites, at room temperature*
• 2 teaspoons pure vanilla extract
• 1/2 cup (120g) full-fat sour cream at room temperature*
• 1/2 cup (120ml) whole milk at room temperature*
• 1/2 cup (80g) rainbow sprinkles* (plus extra for garnish)
• vanilla buttercream or your choice of frosting