Mint Chocolate Chip Cookies

1. Preheat oven to 350F. Line a baking sheet with parchment paper, then set aside.
2. Cream butter and sugar until light and creamy. Add egg and mix until combined. Add in green food dye, if desired and peppermint extract. Mix until combined. Add in flour, cornstarch, baking soda and salt. Mix just until combined, then fold in chocolate chips.
5. Scoop cookie dough by 2 tablespoon measurements, then top with additional semi-sweet chocolate chips, if desired. Bake in oven for 10-12 minutes. Allow to cool for 5 minutes on baking sheet before transferring to wire cooling rack.