I made these for a party a couple of weeks ago and I LOVED them. They are very rich and delicious- but also a little more fussy than a regular cookie because your'e making two different cookie toppings. It was worth it, trust me.
From Six Sisters Stuff
1 Devil's Food Cake Mix
1/2 cup oil
Mix cake mix, oil, and eggs together (don't follow directions on back of cake mix). Drop spoonfuls of dough onto baking sheet. Bake at 350 degrees for 6-9 minutes (do NOT overcook). Let cool completely.
1/2 c. butter, softened
2 Tbs. milk
2 c. powdered sugar
1 tsp. peppermint extract
Green food coloring (I added about 8 drops to get a good color)
Mix together all the ingredients- adjust for desired consistency. Spread on top of each cooled cookie.
2 1/4 c. semi-sweet chocolate chips
3/4 cup butter
Melt chocolate chips and butter together in a double boiler or microwave (for 30-second intervals, stir and repeat until fully melted). Spread melted chocolate on each cookie using the back of a spoon to smooth.