In a large bowl mix together and then place in 13"x9" baking dish: 1 can cream of chicken or cream of mushroom soup, undiluted 1/2 chopped sm. onion 1 (6 or 7 oz.) med. sharp cheddar cheese, shredded 1 pt. sour cream

Melt 1/4 cup butter and mix with 2 heaping cups of Rice Krispies. Spread over top of casserole. Bake in 350 degree oven approximately 1 hour. Remove and serve at once. Garnish with sprigs of fresh parsley if desired. Can be prepared a day ahead of time and refrigerated (DO NOT PREPARE TOPPING UNTIL JUST BEFORE BAKING).