Waffles
["2 c. flour", "2 Tbsp. sugar", "2 1/2 tsp. baking powder", "1 tsp. salt", "4 Tbsp. oil", "4 eggs, separated", "1 2/3 c. milk", "1/2 to 1 c. blueberries (optional)", "1 tsp. cinnamon (optional)"]
["Beat egg whites until stiff peaks form.", "Mix flour, sugar, baking powder, salt, oil, egg yolks and milk.", "Gently fold in egg whites and blueberries, if used.", "Bake in hot waffle iron for approximately 3 to 5 minutes or until they stop steaming."]
["flour", "sugar", "baking powder", "salt", "oil", "eggs", "milk", "blueberries", "cinnamon"]