Preheat the oven to 375 degrees.
In a large mixing bowl, combine butter, sugar, brown sugar, baking soda, milk, vanilla and peppermint extract using mixer.
Beat in the eggs one at a time.
Slowly add the flour 1/4 a cup at time.
Mix in the chocolate chips.
Prepare baking sheets with cooking spray or parchment paper.
Make small cookie dough balls, approximately 1 inch.
Place the cookie dough balls onto the baking sheet and bake for 10-12 minutes or until golden brown. Allow the cookies to cool completely before decorating.