Combine the chocolate cake mix, butter, vanilla, cream cheese, and egg in a large bowl.

Using a mixer mix on medium speed until the dough is smooth and combined.

Refrigerate the dough for 1 hour.

When ready to make the cookies preheat the oven to 350 degrees.

Pick one tablespoon of dough out of the bowl and flatten it. Place a Thin Mint on the dough and then cover it with the excess dough.

Roll the dough in powdered sugar and place on a cookie sheet. Repeat with remaining cookies.

Top the cookies with several green M&M's.

Bake for 11-13 minutes. Remove from oven and cool for 1 minute. Remove the cookies to a wire rack and cool completely.