Heat waffle iron to waffle baking temperature. (I did not need any vegetable spray on grill - mine is well-seasoned.) Place pita flat bread in center of hot waffle grill. Close and grill pita until it is firm and golden brown, but not crispy or dark (perhaps 2 minutes or less, but waffle irons vary so you'll need to experiment.) Remove to wire rack and immediately brush with butter. Break or cut into 4 sections then sprinkle with cinnamon sugar. Cool thoroughly then store.