Simple French Onion Beef Casserole

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Rich, creamy, and layered with savory flavor, this Simple French Onion Beef Casserole is the kind of comfort food that brings everyone running to the table. Imagine tender egg noodles blanketed in a creamy beef and onion sauce, all topped with crispy fried onions that add just the right crunch. It’s a crowd-pleaser that tastes like it took all day to make, but it comes together with surprising ease.

Perfect for weeknight dinners, potlucks, or just when you need a hearty, satisfying meal that warms the soul. The flavors of French onion soup pair beautifully with ground beef and cheese, making each bite indulgent and nostalgic. Whether you’re serving picky eaters or hungry guests, this casserole rarely leaves leftovers.

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Why You’ll Love This Simple French Onion Beef Casserole

• Hearty & filling: Thanks to a combo of ground beef, noodles, and cheese, it’s a complete meal in one dish.
• Comfort in every bite: Creamy, cheesy, and savory with a crispy onion topping.
• Family favorite: Even the pickiest eaters love it.
• Quick assembly: Minimal prep time with maximum flavor.
• Freezer-friendly: Make ahead and store for busy days.

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Preparation Phase & Tools to Use

To make the best Simple French Onion Beef Casserole, having the right tools can make all the difference:

• Large skillet: Essential for browning the ground beef and sautéing onions evenly.
• Mixing bowls: For combining ingredients like sour cream, soup, and seasonings.
• 9×13” casserole dish: The ideal size for even baking and easy serving.
• Wooden spoon or spatula: Helps with gentle mixing to avoid breaking noodles.
• Colander: For draining the cooked noodles quickly.

Taking a few minutes to prep your ingredients and tools before you start cooking ensures a smooth, enjoyable experience from stove to table.

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Ingredients for the Simple French Onion Beef Casserole

• Ground beef: The main protein that brings heartiness and flavor to the base.
• Wide egg noodles: They hold the sauce well and maintain a soft, chewy texture after baking.
• French onion soup (canned): Brings in that classic onion flavor without having to caramelize onions for hours.
• Sour cream: Adds creaminess and balances the richness of the beef.
• Cream cheese: Thickens the sauce and adds tang.
• Shredded mozzarella cheese: Melts beautifully into the mixture, offering stretch and flavor.
• Crispy fried onions: The final crunchy topping that gives texture and extra onion punch.
• Salt & pepper: Basic seasoning to taste.

How To Make the Simple French Onion Beef Casserole

Step 1: Boil the Noodles

Cook egg noodles according to package directions until al dente. Drain and set aside.

Step 2: Brown the Beef

In a large skillet over medium heat, cook the ground beef until fully browned. Season with salt and pepper. Drain any excess grease.

Step 3: Combine the Sauce

Add the French onion soup, sour cream, and cream cheese to the skillet with the beef. Stir continuously until the cream cheese melts and everything is well combined.

Step 4: Mix with Noodles

Gently fold the cooked noodles into the beef mixture, being careful not to break them apart. Mix until fully coated.

Step 5: Assemble the Casserole

Transfer everything into a greased 9×13” casserole dish. Spread it out evenly and top with shredded mozzarella cheese.

Step 6: Bake

Place the casserole in a preheated oven at 350°F (175°C) and bake for 20-25 minutes, or until bubbly.

Step 7: Top & Crisp

Sprinkle crispy fried onions on top and bake for another 5 minutes until golden brown.

Step 8: Serve

Let it sit for a few minutes before serving. Garnish with parsley if desired.

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Serving and Storing the Simple French Onion Beef Casserole

Serve this casserole warm, straight from the oven with a simple side salad or roasted vegetables. It’s indulgent enough to stand alone, but versatile enough to complement a wide range of sides.

To store leftovers, let the casserole cool completely and place it in an airtight container. It keeps well in the refrigerator for up to 4 days. To reheat, pop it in the oven at 350°F until heated through or microwave individual portions.

For make-ahead meals, assemble the casserole fully (without the crispy onions), cover tightly, and freeze for up to 2 months. When ready to bake, thaw overnight in the fridge, add crispy onions, and bake as instructed.

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Frequently Asked Questions

What can I substitute for French onion soup?

If you’re out of canned French onion soup, you can use beef broth mixed with sautéed onions and a dash of Worcestershire sauce as a substitute.

Can I use ground turkey instead of beef?

Yes! Ground turkey works well and gives a slightly lighter taste while still soaking up the creamy sauce.

Do the crispy onions stay crunchy?

They do right after baking. If storing leftovers, they may soften slightly, but still offer flavor.

Can I make this casserole ahead of time?

Definitely. Prepare everything except the crispy topping, cover and refrigerate for up to 24 hours. Add onions just before baking.

Is it freezer-friendly?

Yes! Assemble it ahead, freeze before baking, then thaw and bake when needed.

Can I add vegetables to this casserole?

Absolutely. Mushrooms, peas, or green beans blend nicely into the mix if you want to bulk it up with veggies.

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Want More Casserole Ideas with a Twist?

If you love this hearty Simple French Onion Beef Casserole, check out these comforting, flavor-packed options too:

• Million Dollar Ravioli Casserole for cheesy, baked perfection.
• Easy Baked Potato Chicken and Broccoli Casserole for a loaded dinner bowl in one dish.
• Minimal Ingredient Hobo Casserole if you want something rustic and fast.
• Sloppy Joe Casserole for nostalgic flavors with a bubbly finish.
• Garlic Butter Beef Cheesy Bowtie Pasta for an ultra-comforting beef and pasta bake.

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And let me know in the comments how yours turned out! Did you add extra cheese or mix in veggies? Did your family ask for seconds?

I love seeing how you make these dishes your own. Share your twist or ask a question—let’s make dinner easier together.

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