Preheat the oven to 350 degrees. Line a cookie sheet with parchment paper.
Cream together the butter, granulated sugar, and brown sugar in a large mixing bowl for about 2 minutes till nice and light and fluffy. 1 cup Unsalted Butter, 1 cup Granulated Sugar, 2/3 cup Brown Sugar
Add in the Eggs, and Vanilla Extract and mix until just combined. Scrape the bottom and sides of the bowl as needed. 2 large Eggs, 1 tsp Vanilla Extract
Add the Dry ingredients, flour, cocoa powder, baking soda, and salt; to a medium bowl and whisk together until there are no clumps. 2 1/4 cups All Purpose Flour, 2/3 cup Unsweetened Cocoa Powder, 1 tsp Baking Soda, 1/2 tsp Salt
Pour the dry ingredients into the wet ingredients and mix until you have a soft cookie dough.
Add in 1 and 1/2 cup of the Andes Mint pieces and fold them into the dough until evenly divided. 2 cups Andes Mints
Scoop the dough into 1.5 Tablespoon portions and roll them into balls. Place them at least 2 to 3 inches apart on the prepared cookie sheet.
Bake the cookies for 7 to 10 minutes, or until the top is just set and the sides start to crack.
Remove the cookies from the cookie sheet and let them cool for 5 minutes on the cookie sheet. Top each cookie with a few extra Andes Mints pieces.
Carefully transfer the cookies to a cooling rack to let them cool completely.