preheat oven to 375°F.

stir together flour, soda, cream of tartar, and salt.

beat butter for 30 seconds & add the 2 cups sugar and beat until fluffy.

eggs, milk, and vanilla, beat well.

add dry ingredients to beaten mixture, beating until well combined.

form dough into 1-inch balls, roll in a mixture of the 3 tablespoons sugar and the cinnamon.

place balls 2 inches apart on a cookie sheet; flatten slightly with the bottom of a drinking glass.

bake in a 375°F oven about 8 minutes or until light golden.

makes about 66 cookies