Preheat oven to 350 degrees F. Line a baking sheet with parchment paper or Silpat baking mat or parchment paper. Set aside.
In a medium bowl, whisk together flour, baking soda, salt, and cocoa. Set aside.
With a mixer, cream butter and sugars together until smooth. Add in eggs, one at a time. Next, add in vanilla extract. Mix until just combined.
Gradually add flour mixture and beat until just combined. Mix in the 2 cups of the mint chocolate chips.
Roll cookies into balls, about 2 tablespoons of dough per cookie. Place cookie balls on prepared baking sheet, about 2 inches apart. Top the cookies with remaining mint chocolate chips. Sticking them on top and the sides. This will make the cookies pretty:)
Bake cookies for 10-12 minutes, or until cookies are set, but still soft in the center. Don’t overbake. Remove from oven and let sit on baking sheet for 5 minutes. Move to a cooling rack and cool completely.
Note-this recipe was originally posted in 2009, but I updated the recipe because some readers had issues with the dough being crumbly. The chocolate base recipe is now different. It has eggs and no milk. The new recipe is perfection! I hope you like the cookies!