Preheat oven to 375.
Add dry ingredients in a bowl.
Beat butter, sugar in a separate bowl until creamy. Add eggs, milk, and vanilla. Add dry ingredients to the beaten mixture.
Form dough into 1 " balls and roll in sugar/cinnamon mixture.
Place on lightly greased cookie sheets and flatten with bottom of a glass.
Bake at 375 for about 8 minutes.