The filling is inserted with a pastry bag equipped with a star tip. The tip is pressed through the frosting to the center of the cupcake and then the bag is gently squeezed. Simple!
Here's how to make Bavarian cream filled cupcakes with your free filling. The filling comes in a two-pound bag, enough to fill 50 cupcakes. Simply cut a 1/4-inch corner off the bag, press it into the center of the cupcake like is was a pastry tip and squeeze.