Cheesy Potatoes

2 lbs frozen hash browns
1 cup sour cream
1 can cream of chicken soup
2 tablespoons minced dry onion
2-3 cups grated cheddar cheese
1/2 - 3/4 cup milk
Salt and pepper

Combine ingredients and bake in greased 9x13 pan at 325° for 1 hour.
Optional: Top with crushed potato chips.