Preheat oven to 350° F. Line a cupcake pan with paper liners.
Combine sugar, eggs, cream, and butter, and stir till combined.
In a separate bowl, combine flour, cocoa powder, baking powder, baking soda, salt, and Thin Mint crumbs.
Stir the flour mixture into the butter and sugar mixture.
Fill cupcake liners about ¾ full. Bake 20-25 minutes. Cool in the pan for approximately 5 minutes, then move to a wire rack to cool completely.
Ganache
Place mint chocolate chips in a heat proof bowl.
Heat the cream until warm, but not boiling.
Pour the warm cream over the chips and let sit for about 3 minutes.
Whisk until smooth.
Dip the tops of the cooled cupcakes into the ganache and let set.
Frosting
Mix all ingredients until well combined and smooth.
Add more powdered sugar to thicken, or more cream to thin.
Pipe or spread frosting over the set ganache. Top with a Thin Mint and enjoy!
Notes
If the chocolate chips don't fully melt into a smooth ganache, place the heatproof bowl over a pot of simmering water to create a double boiler to fully melt the chips into a smooth ganache.For extra rich cupcakes, instead of dipping the tops of the cupcakes into the ganache, remove the center of the cupcake and fill with ganache. Be sure the bottom of the cupcake stays in tact.