I found this recipe online when looking for some holiday cookie recipes to bake my co-workers.  I could not, however, find the Nestle Dark Chocolate and Mint Morsels that the recipe called for, even after going to three stores so I substituted Andes Creme de Menthe Baking Chips. 

These were my daughters favorite~

Mint Chocolate Cake Mix Cookies
adapted from The Girl Who Ate Everything

1 box Betty Crocker Dark Chocolate cake mix
2 Tbsp brown sugar
2 eggs
1/3 cup oil
2 Tbsp water
1 (10 oz) bag Andes Creme de Menthe Baking Chips

Mix together the cake mix, eggs, oil, and water until a soft dough forms.  Fold in the mint chips.

Drop by the spoonful onto parchment paper on a baking sheet and bake at 350 degrees for 8-10 minutes or until set in the middle.