Double the pleasure, double the fun with these double chocolate chip muffins. Chocolate Chip Muffins Ingredients 1/2 cup unsalted butter, softened 1 cup sugar 2 teaspoons vanilla 2 teaspoons baking powder 2/3 cup unsweetened cocoa powder 1/2 teaspoon salt 2 eggs 3/4 cup milk 1/3 cup sour cream 2 cups all-purpose flour 1 1/2 cups