Refrigerator Mashed Potatoes - cooking recipe

Ingredients

5 lb. potatoes (9 large)
2 (3 oz.) pkg. cream cheese
1 c. sour cream
2 tsp. onion salt
1 tsp. salt
1/4 tsp. pepper
2 Tbsp. margarine

Preparation

Cook peeled potatoes in boiling salted water until tender. Drain.
Mash until smooth (no lumps).
Add remaining ingredients and beat until light and fluffy.
Cool.