Banana Moon Pie Cupcakes

Name: Banana Moon Pie Cupcakes
Ingredients: 2 cups all-purpose flour; 1 teaspoon baking powder; 3/4 teaspoon baking soda; 1/2 teaspoon salt; 1 1/2 cups granulated sugar; 1/2 cup shortening; 1 cup mashed bananas; 1/4 cup buttermilk; 1 teaspoon vanilla extract; 2 large eggs; Marshmallow Cream Filling, recipe follows; Chocolate Coating, recipe follows; Marshmallow Frosting, recipe follows; 2 cups marshmallow creme, such as Marshmallow Fluff; 1 1/2 cups powdered sugar; 1 cup unsalted butter; 1 1/2 teaspoons vanilla extract; 1 1/2 cups white chocolate chips (12 ounces); 1/4 cup vegetable oil; 1/2 teaspoon banana extract; 1 cup granulated sugar; 2 large egg whites, at room temperature; Pinch cream of tartar; Pinch salt