Onions Au Gratin
["5 c. onions, cooked, drained and chopped", "4 1/2 c. grated Cheddar cheese", "1/2 c. self-rising flour or regular flour plus 1/2 tsp. baking powder", "1/4 tsp. pepper", "1/2 tsp. salt", "6 Tbsp. butter"]
["Mix onions, 3 1/2 cups cheese and remaining ingredients in a 2-quart casserole.", "Sprinkle 1 cup of cheese on top and bake at 350\u00b0 for 30 minutes."]
["onions", "Cheddar cheese", "flour", "pepper", "salt", "butter"]