01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - Whisk together flour, baking soda, and salt in a medium bowl. Set aside.
03 - Beat softened butter, granulated sugar, and brown sugar until light and fluffy, approximately 2-3 minutes.
04 - Beat in eggs one at a time, incorporating fully after each addition. Mix in mint extract, vanilla extract, and green food coloring until uniform color is achieved.
05 - Gradually add dry ingredients to wet mixture, mixing until just combined. Avoid overmixing.
06 - Gently fold in semisweet chocolate chips and chopped dark chocolate until evenly distributed.
07 - Scoop tablespoon-sized dough balls onto prepared baking sheets, leaving 2 inches of space between each cookie.
08 - Bake for 9-11 minutes until edges are set and centers appear slightly underbaked.
09 - Let cookies rest on baking sheet for 5 minutes, then transfer to wire rack to cool completely.