Cake:
- 2 cups unsifted flour
- 1 tsp baking soda
- 1/4 tsp salt
- 1/2 cup cocoa
- 1 cup sugar
- 1 egg
- 1/3 cup oil
- 1 tsp vanilla
- 3/4 cup milk
Filling:
- 1 cup butter
- 2 cups powdered sugar
- 1/2 cup Marshmallow Creme
- 2 tsp peppermint extract
Preheat oven to 350*F
In a large bowl mix flour, baking soda, salt, cocoa and sugar. Add egg, oil, vanilla and milk and combine well. Drop about 2 inches apart on a greased cookie sheet.
Bake for 10-12 minutes until cookies are firm. Watch them carefully as they will harden or burn quickly.
Transfer to a wire rack to cool completely.
In a medium bowl combine butter, marshmallow cream, and mint. Stir in icing sugar until smooth and fluffy. When making filling I recommend using 1 tsp of mint and trying it first before adding the other 1 tsp.
Put filling into a piping bag. Turn one cookie upside down, and cover with as much filling as you want. Top with another cookie and serve.