Microwave 2 cups of chocolate chips and butter in a microwave safe bowl on high for 1 minute. Be sure not to overcook and burn.
Stir the chocolate chips until completely melted. If not fully melted, microwave in 20 second increments until fully melted.
Mix in brown sugar, eggs, peppermint extract and cocoa powder.
Stir in baking soda and flour.
Chill dough for at least 1 hour (you can do this overnight as well and it makes the cookies even more fudgy).
Roll into 30 even balls and place on a parchment lined tray.
Bake at 350° for 12 minutes.
Remove cookies and press 1 piece of chocolate bar into each cookie. Then, place a marshmallow on top of each cookie.
Put cookies back into the oven and broil for 1 minute. Be sure to keep an eye on the cookies so they don’t burn.
Take cookies out of the oven and press each marshmallow down.
Microwave 1/2 cup of chocolate chips in a microwave safe bowl. Microwave in 20-second intervals until chocolate is completely melted, being careful not to burn it.
Drizzle melted chocolate on top of the cookies and sprinkle with crushed peppermint candy or candy canes.