Preheat the oven to 350 F. In a medium bowl, whisk together flour, salt, and baking soda. In a large bowl, mix together butter and sugar until fluffy. Add in egg and mint extract and mix until smooth.
Add in the flour mixture and mix until it is fully combined. Add in the food coloring and fold in the chocolate chips. Place powdered sugar into a shallow dish, and roll cookie dough into balls. Roll each one into the powdered sugar.
Place cookies onto a large ungreased baking sheet at least 2-inches apart. Bake for 10-12 minutes.
