Pink Champagne Cupcakes

Bahan-bahan (24 porsi)

• 2 cups cake flour
• 2 teaspoons baking powder
• 3/4 teaspoon kosher salt
• 1½ cups granulated white sugar
• 3/4 cup (1½ sticks) unsalted butter, (at room temperature)
• 3 large egg whites, (at room temperature)
• 1 large egg, (at room temperature)
• 1½ teaspoons vanilla extract
• 1 cup pink champagne
• 2 tablespoons sour cream
• pink gel color
• Two 8-ounce packages cream cheese, (at room temperature)
• 1 cup (2 sticks) unsalted butter, (at room temperature)
• 32 ounces powdered sugar
• 1 teaspoon vanilla extract