Preheat oven to 350 degrees Fahrenheit. Line baking sheets with parchment paper or silicone baking mats. (Can also substitute cooking spray.)
In the bowl of a stand mixer with the paddle attachment, cream the butter and sugar together. Add the eggs, mint extract, and food coloring. Mix and scrape bowl.
In a separate bowl, stir together the flour, baking soda, salt, and cornstarch. Add the dry ingredients to the wet ingredients and mix to combine.
Fold in the chocolate chips. (*I save about 1/2 cup to press into the tops of the cookies.) Scoop cookie dough balls (I use a #40 scoop) onto prepared baking sheets. (Top with extra chocolate chips, if desired.)
Bake at 350 degrees Fahrenheit for 8-10 minutes, or until the edges are barely starting to brown. Allow cookies to rest on tray for 1-2 minutes. Then transfer to a cooling rack.
Notes
*Mini chocolate chips are optional, but help distribute more chocolate throughout the whole cookie.