What you need:
- 1 box brownie mix (and ingredients needed as stated on box)
 - 1 sleeve Thin Mints (or Kebler's grasshopper cookies), roughly chopped
 - 8 Tbsp. butter, softened
 - 2 cups powdered sugar
 - 2 Tbsp. milk
 - 1/2 tsp. mint extract
 - Green food coloring (optional)
 
Directions:
- Make batter according to box instructions. Stir in chopped cookies.
 - Pour into a prepared 9" pan.
 - Mix together butter, powdered sugar, milk, extract, and food coloring in a bowl.
 - Swirl mixture into brownie batter.
 - Bake at 350* for slightly less than the box states. Cool.
 
Recipe from The Traveling Spoon