Preheat oven to 350.

In a medium saucepan melt the chopped chocolate and unsalted butter over low heat until fully melted and combined.

Whisk the eggs, sugar and vanilla extract in a separate bowl.

Add the melted chocolate, flour, cocoa powder, and baking powder mixing until well blended.

Refrigerate dough for about 20 minutes (so its firm enough to scoop or form into balls).

Spoon the dough onto a lined baking sheet and bake for 8-10 minutes or until the tops start to make that brownie crackle.

While the cookies cool beat together the jar of marshmallow fluff and softened butter until fluffy.

Begin to add the powdered sugar 1/4 cup at a time tasting as you go to see if its sweetened to your liking.

Mix in vanilla at the end.

Assemble sandwiches by piping frosting on the back of one cookie then sandwiching them together.

Lastly roll assembled sandwiches in the crushed peppermint.