
You'll love this bubbling, golden brown, cheesy, creamy potato casserole! It's so easy to make and perfect meal prep. Assemble it the night before and then cook it the next day. It's perfect for holiday celebrations or potlucks and it's a real crowd pleaser!
Preheat your oven to 375°F/190°C.
Place your potatoes in a saucepan of cold water u and simmer until they are fork tender, approximately 12 - 14 minutes.
Then, in a separate pan, melt the butter, then add cream of mushroom soup, sour cream, salt, pepper, onion, and half of the cheese.
Toss the potatoes or frozen hash browns in the mixture until fully combined and place in a prepared baking dish.
Top with the remaining grated cheese and bake until bubbly and browned approximately 30 minutes.
Remove from the oven, serve immediately and enjoy!