Preheat your oven to 350°F and grease a 9x13-inch baking dish. Trust me, the cheese will try to stick.
In a large bowl, mix the hashbrowns, cream of mushroom soup, sour cream, one and a half cups of cheddar cheese, green beans, onion, butter, and seasonings. Stir until everything feels evenly coated — kind of like tossing a big cheesy salad.
Spread the mixture into your prepared dish and sprinkle the remaining cheese on top. If you’re feeling fancy, add some crushed cornflakes or breadcrumbs for that satisfying crunch.
Bake uncovered for about 45 minutes, or until the top is golden and bubbly. You’ll know it’s ready when the kitchen smells like pure happiness.
Let it cool for a few minutes before serving. It’ll firm up just enough to scoop perfectly — and yes, licking the spoon is allowed.