French Onion Ground Beef & Noodle Casserole

A cozy, comforting casserole inspired by classic French onion soup—savory beef, tender noodles, caramelized onions, and melty cheese all baked to perfection. Easy, hearty, and family-friendly!

Ingredients

1 pound ground beef
1 medium onion, thinly sliced
2 cups egg noodles (uncooked)
1 can (10.5 oz) French onion soup
1 cup beef broth
1 cup sour cream
1½ cups shredded mozzarella or Swiss cheese (or a mix)
½ cup grated Parmesan cheese
2 tablespoons butter
1 teaspoon garlic powder
½ teaspoon black pepper
Salt, to taste
Optional: fresh parsley or thyme for garnish

Instructions

Preheat oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish.
Cook the noodles according to package directions until just al dente. Drain and set aside.
Caramelize the onions:
In a large skillet over medium heat, melt the butter. Add sliced onions and cook slowly for 10–12 minutes, stirring often, until soft and golden brown. Remove and set aside.
Brown the beef:
In the same skillet, add ground beef and cook until browned. Drain excess fat. Season with garlic powder, black pepper, and a little salt.
Make the sauce:
Stir the French onion soup, beef broth, sour cream, and caramelized onions into the beef. Mix well and simmer for 2–3 minutes.
Combine:
Add cooked noodles to the skillet and gently mix until everything is well coated.
Assemble:
Transfer the mixture to the prepared baking dish. Sprinkle mozzarella (or Swiss) and Parmesan evenly over the top.
Bake:
Cover loosely with foil and bake for 20 minutes. Uncover and bake an additional 10 minutes, or until bubbly and golden.
Rest & serve:
Let sit for 5 minutes before serving. Garnish with parsley or thyme if desired.