Loaded Mashed Potato Casserole is like a hug in a dish! Creamy mashed potatoes get a serious upgrade with melted cheese, crispy bacon, and a sprinkle of green onions.
Boil chopped potatoes in a large pot with salt and garlic, until the potatoes are fork-tender. Drain.Add potatoes, butter, sour cream, salt, pepper, and milk. Mash until smooth and creamy.
Spread into the prepared baking dish. Top with the remaining cheese and bacon. Bake in the preheated oven for 20-25 minutes, or until the cheese is melted and bubbly. Remove from the oven and garnish with the remaining green onions.