Creamy Potato Casserole

2 1/2-3 lbs shredded hash browns
2 Cups of shredded cheddar cheese
1/2 cup onion, diced
2 cups heavy cream
2 cup half and half
1 teaspoon salt
pepper

1.Preheat oven 350 degrees.
2 Combine all ingredients and stir until well mixed.
3 Butter a large casserole dish.
4 Pour mixture into dish.

5 Cover dish and bake for one hour.
6 Uncover and bake till top is golden brown approximately 20-25 minutes.