1 whole cooked, diced chicken
2 cans cream of chicken soup
1 onion, chopped
1 can mushrooms
1 lg. pkg. potato chips (crumbled), reserve 1/2 c. for top
1 c. chopped celery

Mix all ingredients together, add 1 to 1 1/2 cups milk. Put into a casserole. Top with pats of butter and reserved potato chips. Bake at 350 degrees for 1 hour.