French Onion Beef Casserole

Here is a French Onion Beef Casserole with clear, detailed, step-by-step directions. This version is rich, savory, and very straightforward.

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French Onion Beef Casserole

Serves

6

Prep Time

15 minutes
Cooking Time: 45–50 minutes

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Ingredients

Beef Layer

• 1½ lb (680 g) ground beef

• 1 medium onion, finely chopped

• 2 cloves garlic, minced

• 1 tsp salt

• ½ tsp black pepper

Sauce

• 1 can (10.5 oz / 300 g) condensed French onion soup

• 1 cup sour cream

• 1 tbsp Worcestershire sauce

Casserole Base

• 3 cups cooked egg noodles or rice

• 1½ cups shredded mozzarella or Swiss cheese

Topping

• 1½ cups French fried onions

• ½ cup grated Parmesan cheese

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Step-by-Step Directions

Step 1: Preheat and Prepare

1. Preheat the oven to 375°F (190°C).

2. Lightly grease a 9×13-inch baking dish.

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Step 2: Cook the Beef

1. Heat a large skillet over medium heat.

2. Add the ground beef and chopped onion.

3. Cook, breaking up the meat, until the beef is fully browned and the onion is soft.

4. Add the garlic, salt, and pepper.

5. Cook for 1 minute more.

6. Drain off excess grease.

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Step 3: Make the Sauce

1. In a bowl, combine the French onion soup, sour cream, and Worcestershire sauce.

2. Stir until smooth and well blended.

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Step 4: Assemble the Casserole

1. Spread the cooked noodles or rice evenly in the prepared baking dish.

2. Spoon the beef mixture over the base.

3. Pour the sauce evenly over the beef.

4. Sprinkle the shredded mozzarella or Swiss cheese on top.

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Step 5: Bake

1. Cover the dish with foil.

2. Bake for 25 minutes.

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Step 6: Add the Topping

1. Remove the foil.

2. Sprinkle the French fried onions and Parmesan cheese evenly over the top.

3. Return the dish to the oven.

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Step 7: Finish Baking

1. Bake uncovered for an additional 15–20 minutes.

2. The casserole should be hot throughout, bubbly at the edges, and golden on top.

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Step 8: Rest and Serve

1. Remove from the oven and let rest for 5 minutes.

2. Serve hot.

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Tips and Variations

• Substitute ground turkey for a lighter version.

• Add sautéed mushrooms for a more traditional French onion flavor.

• Use Gruyère cheese instead of mozzarella for a deeper flavor.

• For extra richness, stir 2 tablespoons butter into the noodles before layering.