Preheat oven to 350 degrees F. In a mixing bowl, combine flour, baking powder, salt, and mace. In another mixing bowl, beat together ½ cup sugar, oil, egg, and vanilla on medium speed for 30 seconds. Add flour mixture and milk alternately to egg mixture, beating on low after each addition, just until combined. Fill 10-12 greased muffin cups ? full with batter. Bake for 15-20 minutes or until done. Meanwhile, in a shallow bowl, place the melted butter. In another shallow bowl, combine the remaining ½ cup sugar and cinnamon. When the puffs are done, remove from cups and, while still hot, roll the tops in melted butter and then in the cinnamon sugar. Serve immediately, either plain or with butter and jelly, if desired.