Place biscuits on cutting board. With 1 1/4-inch round biscuit cutter, cut hole in center of each.
In bowl, mix sugar and cinnamon. Dip all sides of biscuits and centers into butter; shake off excess butter. Coat with cinnamon-sugar. Place on ungreased large cookie sheet.
Bake at 350°F 14 to 18 minutes or until golden brown.