My grandmother and Ryan's mom have both always made these, so of course I followed suit. They are a forever favorite.
Mashed Potato Casserole/ Do Ahead Mashed Potatoes
About 6-8 lbs. potatoes- peeled and diced
1 stick butter
1 8 oz. bar cream cheese
1 pint sour cream (16 oz)
1 medium or a little over 1/2 large onion- grated
Boil potatoes in large stock pot until they break with a fork. Drain and mash. Add in all ingredients and mash/ mix well- (I mash then get out my beater). Place tehm in a large casserole dish. At this point you can refirgerate them for up to a couple days (i.e for large holiday meals), hence why my grandmother called them do ahead mashed potatoes- I usually however just make them all at once. Top with a couple pads of butter and some paprika if you want to make it look pretty =). Bake at 350 degrees for about 30 minutes. This dish also travels well!