There are casseroles that are time-intensive and totally from scratch and then there are casseroles that take a few basic ingredients and quickly combine them in a way that somehow makes them even better, even more comforting. This Hamburger Supreme Casserole is more of the latter, the type of cozy casserole that families have been turning to for decades when they want something easy and sure to be delicious. It’s humble, but it always hits the spot.
1 lb lean ground beef
1 small onion, chopped
1 (10.5 oz) can cream of mushroom soup
1/2 cup milk
1/2 teaspoon garlic powder
1/2 teaspoon dried thyme
1 (4 oz) can mushrooms, drained
2 cups macaroni, uncooked
2 cups sharp cheddar cheese, grated
Kosher salt and freshly ground black pepper, to taste
Preheat oven to 350°F and grease a 2-quart casserole dish with butter or nonstick spray. Set aside.
Cook macaroni 1 to 2 minutes less than package directions call for, drain, and set aside.
In a large skillet, season beef with garlic powder, thyme, salt, and pepper and brown with onions until cooked through and onions are tender.
Stir in soup, milk, and mushrooms and season to taste.
Arrange half of meat mixture into bottom of baking dish. Layer with half of the macaroni and half of the cheese. Layer once more with remaining meat and remaining macaroni.
Bake uncovered for 20 minutes. Top with remaining cheese and bake until cheese is bubbly and golden brown, about 10 minutes more.