Chocolate Chip Cupcakes with Chocolate Chip Frosting

INGREDIENTS

• 3 1/4 cups sifted cake flour (not self-rising)
• 1 1/2 tablespoons baking powder
• 1/4 teaspoon salt
• 7 ounces (1 3/4 sticks) unsalted butter, softened
• 1 3/4 cups sugar
• 1 cup plus 2 tablespoons milk
• 1 tablespoon pure vanilla extract
• 5 large egg whites, room temperature
• 2 cups semisweet chocolate chips
• Chocolate Chip Frosting