Preheat oven to 375 F. Line a couple of large baking sheets with parchment paper.
In a medium bowl sift together flour, salt, baking soda, and baking powder. Whisk to combine, then set aside.
In a large bowl add the room temperature butter, sugar, and brown sugar. Using a hand mixer, beat until fluffy and combined.
Add eggs, yolk, vanilla, and mint extract. Beat to combine.
Add 5-7 drops of green gel food coloring. Beat to fully incorporate the color.
Add in the flour mixture ⅓ at a time, mix to combine.
Once combined, pour in the mint chocolate chips. Fold in completely.
Use a large ice cream scoop, or measure a 2-3 tablespoon ball of dough to place on your baking sheet.
Bake for 15-18 minutes or until lightly browned on the edges.
Allow to cool completely before serving.
Notes
Make sure ingredients are at room temperature and set out at least 30 minutes before starting your recipe.Experiment with different inclusions. Let me know in the comments what you mixed into your cookie dough and if you enjoyed the experience.For a full green cookie, use green mint chips in place of chocolate mint chips or Andes chips.For a cookie without green food coloring, use matcha powder as a natural green food coloring. This may alter the flavor just a bit, but the mint should overpower the earthy matcha.Add even more chocolate on top before baking. Once baked and before transferring to a cooling rack, use a large cookie cutter to shape your cookies into the perfect circle shape.