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