01 - 
                Coat a 9-inch square pan with butter. Spread out a single layer of whole Mint Oreos at the bottom. Chop up the rest of the cookies and keep them aside for later.
              
              
              
                02 - 
                Follow the instructions on the brownie mix box to make the batter. Evenly pour it over the Oreo cookie layer in the pan. Bake it until a toothpick inserted comes out slightly crumbly but not wet.
              
              
              
                03 - 
                Lay the Andes Mints across the top of the baked brownies in a single layer. Pop them back in the oven for about 2 minutes to soften. Spread the melted mints across the top with a knife.
              
              
              
                04 - 
                Scatter the chopped Oreos on top. Let it totally cool, which should take around an hour.
              
              
              
                05 - 
                Cut into squares and enjoy. You can store leftovers in a sealed container for up to seven days.