Make-Ahead Mashed Potatoes - cooking recipe

Ingredients

6 medium potatoes
4 oz. dairy sour cream
3 oz. pkg. cream cheese
1 Tbsp. margarine
1 tsp. onion salt
1/4 tsp. pepper
1/4 to 1/2 c. milk
1 Tbsp. margarine

Preparation

Cook and prepare potatoes, as if making mashed potatoes.
Add all ingredients, except 1 tablespoon margarine after mashing potatoes.
Turn into a greased 1 1/2-quart casserole.
Cover with foil.
Chill up to 24 hours.