I changed my version up by using a cake mix and my regular fluffy icing recipe. I didn't have the necessary ingredients for the Spong Cake used and I wanted the icing to be thicker like the actual center of a Peppermint Patty.
You can go over to A Cuppy Cake life to find the original recipe I found. Here's my quick and easy version:
Peppermint Patty Cupcakes
Use a chocolate cake mix and follow instructions as on box. Fill the cupcake liners only 1/2 full. Bake and cool.
1/2 cup shortening
1/4 cup milk
1 tsp. Peppermint Flavoring
4 cups powdered sugar (est.)
Combine shortening, milk and peppermint flavoring. Beat. Add powdered sugar. Beat until well mixed. Continue beating until fluffy. You may have to add a little more milk/sugar to get the consistency you desire.
Pipe the icing onto the cupcakes.
Garnish with a mini Peppermint Patty.
I took these to a church picnic and they were devoured! They were really, really good. A must try.