2 c. uncooked macaroni
1 lb. Velveeta cheese (grated)
1 c. mayonnaise
1 c. mushroom soup
1 med. onion (chopped)
1 can mushrooms (bits and pieces)
2 c. coarsely crushed Ruffles Potato Chips

Cook macaroni until tender. Drain. Add remaining ingredients except potato chips. Pour in large casserole dish. Sprinkle top with potato chips. Bake 30 minutes at 350 degrees.