Mix dry ingredients and set aside. Pour half the water in a large mixer bowl. Add dry mixture and mix on slow setting until a thick batter. Slowly add remaining water; mix well and pour into generously greased sheet pans. Bake in preheated 500ºF. oven about 10 to 15 minutes or until brown. Brush with melted butter. Cut into 4 inch squares. Use 4 pans, 24 x 24 inch. Serves 120