French Onion Ground Beef and Rice Casserole

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French Onion Ground Beef and Rice Casserole is the ultimate comfort food, bringing together rich, savory flavors in a creamy, cheesy dish that’s perfect for busy weeknights. I love how this casserole comes together with minimal effort yet delivers such a satisfying meal. The combination of caramelized onions, seasoned ground beef, and tender rice baked under a layer of gooey, melted cheese makes every bite irresistible.

This dish reminds me of home-cooked meals from childhood—warm, hearty, and full of flavor. The French onion soup mix gives it that classic depth, while the beef and rice provide a filling base. Whether you’re feeding a hungry family or looking for a make-ahead meal, this casserole checks all the boxes.

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Why You’ll Love This French Onion Ground Beef and Rice Casserole

• Easy to Make: Simple ingredients and minimal prep time make this a hassle-free dinner option.
• Packed with Flavor: French onion soup mix adds a rich, savory depth to the dish.
• Hearty and Filling: A perfect balance of protein, carbs, and cheese to satisfy any appetite.
• One-Pan Wonder: Everything bakes together in a single dish, making cleanup a breeze.
• Great for Meal Prep: Make it ahead and reheat for quick lunches or dinners.

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What Kind of Rice Should I Use?

For this casserole, long-grain white rice works best because it absorbs the flavors beautifully while keeping a fluffy texture. If you prefer a heartier option, brown rice can be used, but it may require additional liquid and a longer cooking time. Instant rice is not recommended, as it tends to become mushy in the baking process. If you’re in a hurry, parboiled rice is a good alternative since it cooks faster while still maintaining its structure.

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Options for Substitutions

• Ground Beef Alternatives: Swap the ground beef for ground turkey, chicken, or even plant-based crumbles for a lighter or vegetarian version.
• Cheese Variations: While mozzarella and cheddar are classic choices, Swiss or provolone can add extra richness. A sprinkle of Parmesan on top enhances the flavor.
• Onion Options: If you don’t have French onion soup mix, use caramelized onions with beef broth and a dash of Worcestershire sauce.
• Rice Alternatives: Try using wild rice or quinoa for a more textured, nutritious twist. Just be mindful of the cooking time adjustments.
• Gluten-Free Option: Use a gluten-free French onion soup mix and ensure all ingredients are gluten-free.
• Dairy-Free Adaptation: Swap the cheese for dairy-free alternatives and use a plant-based butter substitute for a lactose-free dish.

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Ingredients for This French Onion Ground Beef and Rice Casserole

• Ground Beef – The main protein in this dish, adding a rich and savory flavor. You can substitute with ground turkey or chicken for a leaner option.
• Long-Grain White Rice – Absorbs the flavors of the broth and onions while maintaining a fluffy texture. Brown rice can be used but will require a longer cooking time.
• French Onion Soup Mix – The key ingredient that gives this casserole its signature deep, oniony flavor. You can make your own by combining dried onions, beef bouillon, and seasonings.
• Beef Broth – Adds moisture and enhances the savory taste of the dish. Low-sodium broth is a great option if you’re watching your salt intake.
• Onion – Provides extra depth to the dish. Caramelizing it beforehand enhances the sweetness and richness.
• Butter – Helps sauté the onions and adds a silky richness to the overall dish.
• Shredded Cheese – A combination of mozzarella and cheddar creates a gooey, golden topping. Swiss or provolone can be used for a more French onion-inspired taste.
• Cream of Mushroom Soup – Contributes to the creamy texture and enhances the umami flavor. Cream of chicken can also be used for a slightly different taste.
• Garlic Powder & Black Pepper – Simple seasonings that complement the richness of the casserole.
• Parsley (Optional) – A fresh garnish that adds a pop of color and a slight herbal note to balance the richness.

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Step 1: Prepare the Ingredients

Start by preheating your oven to 350°F (175°C). While the oven is heating, finely chop the onion and gather all your ingredients. This will make the cooking process smoother and more efficient.

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Step 2: Cook the Ground Beef and Onions

In a large skillet over medium heat, melt the butter and sauté the chopped onion until soft and caramelized, about 5-7 minutes. Add the ground beef and cook until browned, breaking it apart with a spatula. Drain any excess grease.

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Step 3: Combine the Ingredients

To the cooked beef and onion mixture, add the French onion soup mix, beef broth, cream of mushroom soup, garlic powder, and black pepper. Stir well to combine. Then, mix in the uncooked rice, ensuring it is evenly distributed.

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Step 4: Assemble the Casserole

Transfer the mixture into a greased 9×13-inch baking dish. Spread it out evenly and cover the dish tightly with aluminum foil. This helps trap the steam, allowing the rice to cook properly.

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Step 5: Bake the Casserole

Place the dish in the preheated oven and bake for 40-45 minutes. Check for doneness by ensuring the rice is fully cooked and has absorbed the liquid. If needed, add a bit more broth and bake for an additional 5-10 minutes.

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Step 6: Add the Cheese Topping

Once the casserole is fully cooked, remove the foil and sprinkle shredded cheese evenly over the top. Return the dish to the oven and bake uncovered for another 10 minutes, or until the cheese is melted and bubbly.

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Step 7: Serve and Enjoy

Let the casserole rest for about 5 minutes before serving. Garnish with fresh parsley, if desired, and enjoy this comforting dish with your favorite side.

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How Long to Cook the French Onion Ground Beef and Rice Casserole

This casserole requires about 50-55 minutes of total baking time. Here’s a breakdown:

• 40-45 minutes covered – This allows the rice to absorb the broth and cook fully.
• 10 minutes uncovered – This melts the cheese and gives it a golden, bubbly top.
• 5 minutes resting time – Letting the casserole sit before serving helps the flavors settle and prevents burns from the hot cheese.

If using brown rice or a different grain, expect to increase the baking time by 10-15 minutes and add extra broth as needed.

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Tips for Perfect French Onion Ground Beef and Rice Casserole

• Caramelize the Onions Well – Don’t rush this step! Let the onions cook slowly until golden brown to bring out their natural sweetness.
• Use the Right Rice – Long-grain white rice is ideal for the best texture. Avoid instant rice, as it can become mushy.
• Cover While Baking – This ensures the rice steams properly and absorbs the flavors without drying out.
• Check the Liquid Levels – If the rice looks undercooked or dry, add a little more broth and bake for another 5-10 minutes.
• Shred Your Own Cheese – Pre-shredded cheese contains anti-caking agents that prevent smooth melting. Freshly shredded cheese gives the best results.
• Let It Rest Before Serving – This helps the casserole firm up slightly, making it easier to scoop and serve.
• Make It Ahead – Assemble the casserole earlier in the day, refrigerate, and bake when ready for a quick and easy dinner.

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Watch Out for These Mistakes While Cooking

• Using Instant Rice – It cooks too quickly and turns mushy, ruining the texture of the casserole. Stick with long-grain white rice or adjust liquid and time for other varieties.
• Skipping the Onion Caramelization – The depth of flavor comes from slowly cooking the onions. Rushing this step results in a bland dish.
• Not Covering While Baking – The rice needs steam to cook properly. Always cover the casserole with foil before baking.
• Adding Too Much Liquid – While rice needs moisture, excessive broth can make the casserole soupy instead of creamy. Stick to the recommended measurements.
• Overcooking the Ground Beef – Since the beef continues cooking in the oven, browning it too much in the skillet can lead to a drier casserole.
• Forgetting to Rest the Casserole – Letting it sit for 5 minutes helps it set up, making it easier to serve without falling apart.
• Using Pre-Shredded Cheese – Freshly shredded cheese melts much better, while pre-shredded varieties contain anti-caking agents that can affect texture.
• Skipping Seasoning Adjustments – Taste the mixture before baking to ensure it has enough salt, pepper, and seasonings to enhance the flavor.

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What to Serve With French Onion Ground Beef and Rice Casserole

1. Garlic Bread

A crispy, buttery slice of garlic bread pairs perfectly with the creamy casserole and helps soak up all the delicious flavors.

2. Green Beans

Steamed or roasted green beans add a fresh, slightly crunchy contrast to the rich casserole.

3. Roasted Brussels Sprouts

Their slightly charred, caramelized flavor complements the deep onion and beefy taste of the dish.

4. Side Salad

A simple green salad with a light vinaigrette balances the richness and adds a refreshing crunch.

5. Mashed Potatoes

For an ultra-comforting meal, serve the casserole alongside creamy mashed potatoes for extra indulgence.

6. Sauteed Mushrooms

Mushrooms enhance the umami flavors already present in the dish, making them a great complementary side.

7. Steamed Broccoli

A nutritious and easy side that adds color and freshness to the plate.

8. Pickled Vegetables

Tangy pickles or pickled onions cut through the richness and add an unexpected but delightful contrast.

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Storage Instructions

Refrigerating

Store any leftover casserole in an airtight container in the refrigerator for up to 4 days. Let it cool to room temperature before sealing to prevent excess moisture buildup.

Freezing

This casserole freezes well! Wrap it tightly with plastic wrap and aluminum foil, or store it in a freezer-safe container for up to 3 months. To reheat, thaw overnight in the fridge and bake at 350°F (175°C) for about 20-25 minutes, or until warmed through.

Reheating

• Oven: Cover with foil and bake at 350°F for 15-20 minutes until heated thoroughly.
• Microwave: Heat in 1-minute intervals, stirring between each, until fully warmed. Add a splash of broth if needed to keep it moist.

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Estimated Nutrition (Per Serving)

Note: Values are approximate and depend on ingredient choices.

• Calories: ~450
• Protein: ~25g
• Carbohydrates: ~40g
• Fat: ~20g
• Saturated Fat: ~10g
• Cholesterol: ~70mg
• Sodium: ~900mg (varies by broth and cheese used)
• Fiber: ~2g
• Sugar: ~3g

For a lighter version, use ground turkey, low-fat cheese, and reduced-sodium broth.

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Frequently Asked Questions

1. Can I make this casserole ahead of time?

Yes! Assemble the casserole, cover it tightly, and store it in the fridge for up to 24 hours before baking. If baking straight from the fridge, add an extra 10 minutes to the cooking time.

2. Can I use brown rice instead of white rice?

Yes, but brown rice requires more liquid and a longer baking time (about 10-15 minutes extra). Be sure to check for doneness before serving.

3. What can I use instead of cream of mushroom soup?

You can substitute it with cream of chicken soup, cream of celery soup, or make a homemade version using a roux with milk and mushrooms.

4. How do I prevent the casserole from drying out?

Make sure to cover it while baking, use the right amount of broth, and avoid overbaking. If reheating, add a splash of broth to restore moisture.

5. Can I make this casserole gluten-free?

Yes! Use a gluten-free French onion soup mix and ensure all ingredients, including broth and soup, are certified gluten-free.

6. Can I add vegetables to the casserole?

Absolutely! Mushrooms, peas, carrots, or bell peppers make great additions. Sauté them with the onions before mixing them into the casserole.

7. What type of cheese melts best for this dish?

Mozzarella and cheddar work great for a gooey topping. Swiss or provolone add a more French onion soup-like flavor.

8. Can I cook this in a slow cooker?

Yes! Brown the beef and onions first, then transfer everything to a slow cooker. Cook on low for 4-5 hours or high for 2-3 hours, adding cheese towards the end.

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Conclusion

French Onion Ground Beef and Rice Casserole is a comforting, flavorful dish that’s easy to make and perfect for busy nights. Whether you prepare it fresh or make it ahead of time, this cheesy, savory casserole is always a crowd-pleaser. If you love this recipe, don’t forget to save it on Pinterest and share it with your family and friends!

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