Simple French Onion Beef Casserole

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When it comes to cozy, satisfying meals, few things rival the comfort of a good casserole. The Simple French Onion Beef Casserole is a weeknight champion. It delivers rich, savory flavors inspired by classic French onion soup, but in a form that feeds the whole family with ease. Layers of caramelized onions, seasoned ground beef, creamy sauce, and melty cheese make this dish the kind of recipe you’ll turn to again and again.

This casserole is perfect for those evenings when you want something hearty without spending all night in the kitchen. The ingredients are simple, the process is straightforward, and the payoff is a bubbling, golden-brown beauty that fills your home with irresistible aromas. Pair it with a simple salad or roasted veggies and dinner is done.

Why You’ll Love This Simple French Onion Beef Casserole

This recipe blends comfort and convenience in the best possible way. It hits all the flavor notes you want from a hearty meal: savory beef, sweet and tender onions, and gooey cheese all baked together. It’s also incredibly adaptable. Add mushrooms, swap cheeses, or toss in herbs to make it your own. Plus, it reheats like a dream, making leftovers just as crave-worthy.

What Kind of Onions Should I Use?

Yellow onions are the traditional go-to for this dish because they develop a rich sweetness when caramelized. You could use sweet onions if you prefer an even more mellow flavor, or red onions for a little tang. The key is to slice them evenly and cook them low and slow until they’re golden and fragrant. Don’t rush this part—those deeply caramelized onions are the heart of the flavor.

Ingredients for the Simple French Onion Beef Casserole

The ingredients are basic pantry staples, but each one plays an important role in creating the dish’s comforting depth.

• Ground beef: Brings protein and savory richness.
• Yellow onions: Slowly caramelized to build that signature sweetness.
• Garlic: Adds a punch of flavor to the beef.
• Beef broth: Infuses the dish with depth and mimics the classic soup base.
• Worcestershire sauce: Adds umami and a subtle tang.
• Cream cheese: Makes the sauce creamy and smooth.
• Mozzarella cheese: Melts beautifully for that golden topping.
• Egg noodles: Serve as the base and soak up all that flavorful sauce.
• Butter: Used for sautéing the onions to golden perfection.
• Salt and pepper: Essential for seasoning.

How To Make the Simple French Onion Beef Casserole

Step 1: Caramelize the Onions

In a large skillet, melt the butter over medium-low heat. Add sliced onions and cook slowly, stirring occasionally, until they’re golden brown and caramelized. This can take 20 to 30 minutes but it’s worth the time.

Step 2: Cook the Beef

Once the onions are done, push them to the side of the skillet. Add the ground beef and minced garlic. Cook until browned, breaking it up as it cooks. Drain excess grease.

Step 3: Build the Sauce

Add Worcestershire sauce and beef broth to the skillet. Stir in cream cheese until melted and smooth. Let the mixture simmer for a few minutes to thicken slightly.

Step 4: Assemble the Casserole

Preheat the oven to 350°F. In a greased baking dish, combine cooked egg noodles with the beef and onion mixture. Mix well to coat everything in the sauce. Top with shredded mozzarella cheese.

Step 5: Bake Until Golden

Bake uncovered for about 20 minutes or until the cheese is melted and bubbly. If you like a golden top, broil for the last 2-3 minutes.

How to Serve and Store This Casserole

This casserole serves about 6 people generously, making it ideal for family dinners or small gatherings. Serve it hot out of the oven, garnished with a sprinkle of fresh herbs if you like. It pairs wonderfully with a crisp green salad or steamed green beans for a balanced meal.

Leftovers can be refrigerated for up to 4 days in an airtight container. To reheat, pop it in the oven at 350°F for about 15 minutes or microwave individual servings. It also freezes well—just let it cool completely before storing it in a freezer-safe container.

What to Serve With Simple French Onion Beef Casserole?

Crisp Garden Salad

A fresh green salad with vinaigrette adds a cool contrast to the rich casserole.

Garlic Bread

Crusty garlic bread is perfect for soaking up any leftover sauce.

Roasted Broccoli

Add a pop of green and a slightly charred bite to your plate.

Balsamic Glazed Carrots

Sweet and tangy carrots balance the savory flavors.

Sauteed Green Beans

A quick and simple side that keeps things light.

Creamy Mashed Potatoes

For double the comfort, serve this casserole over a bed of buttery mash.

Coleslaw

The tangy crunch adds great contrast.

Pickled Veggies

A little acid cuts through the richness and adds zing.

Want More Casserole Ideas?

If you love comforting casseroles, here are some other hearty favorites from the blog:

• Easy Baked Burrito Casserole Recipe
• Cheesy Beef Enchilada Tortellini
• Loaded Cheddar Ranch Beef and Sweet Corn Rotini Bake
• Chicken and Dressing Casserole
• Cajun Potato Soup for another cozy comfort dish

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And let me know in the comments how yours turned out. Did you add mushrooms? Try a different cheese? I’m always excited to hear your twists on it.

Explore beautifully curated health-boosting dinners and cozy comfort food on Zoe Recipes on Pinterest and find more inspiration for every day of the week.

Conclusion

The Simple French Onion Beef Casserole is everything a weeknight dinner should be: delicious, comforting, and incredibly easy to make. Whether you’re cooking for your family or meal-prepping for the week, this dish checks all the boxes. From the sweet caramelized onions to the savory beef and gooey cheese, it’s a guaranteed crowd-pleaser that never gets old.

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