S’mores Whoopie Pies... S’mores Whoopie Pies   Ingredients For the Cake 1 cup white sugar 3/4 cup and 2 tablespoons all-purpose flour 1/4 cup and 2 tablespoons unsweetened cocoa powder 3/4 teaspoon baking powder 3/4 teaspoon baking soda 1/2 teaspoon salt 1 egg 1/2 cup milk 1/4 cup vegetable oil 1 teaspoon vanilla extract 1/2