Preheat oven to 450°. In a large bowl, whisk flour, baking powder, sugar, salt and cream of tartar. Cut in butter until mixture resembles coarse crumbs. You can do this with a food processor or with two forks in a criss-cross motion. Stir in cheese and garlic. Add milk; stir just until moistened.
Drop dough by heaping 1/4 cupfuls 2 inches apart onto a greased baking sheet. Bake 10-15 minutes or until golden brown. Brush glaze on top of biscuits after they come out of the oven. Serve warm.
Source: Biscuits adapted from Taste of Home. Glaze from me.