French Onion Ground Beef Rice Casserole

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Golden, bubbly, and irresistibly savory — the French Onion Ground Beef Rice Casserole is comfort food at its finest. Combining the deep, caramelized flavors of French onion soup with hearty ground beef, fluffy rice, and melty cheese, this dish transforms simple ingredients into something deeply satisfying. Each bite delivers rich umami notes and just the right amount of creamy texture, balanced by the irresistible crisp of the cheesy topping.

Perfect for busy weeknights or when you’re craving a no-fuss, family-friendly dinner, this casserole delivers bold flavor with minimal prep. It’s one of those go-to meals that warms your soul and fills your home with an inviting aroma. With pantry staples and straightforward steps, this recipe is as easy as it is delicious.

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

• A comforting classic with bold, savory flavors.
• Uses pantry staples and budget-friendly ingredients.
• Minimal prep time and perfect for make-ahead meals.
• Kid-approved and ideal for feeding a hungry crowd.
• Great as leftovers — it reheats beautifully.

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Preparation Phase & Tools to Use

Essential Tools and Equipment:

• Large Skillet or Sauté Pan – for browning the ground beef and building flavor.
• Mixing Bowl – to combine the rice and soup mixture evenly.
• 9×13 Baking Dish – the perfect size for even baking and holding the casserole layers.
• Wooden Spoon or Spatula – to stir ingredients without scratching cookware.
• Foil – to cover the casserole during part of the baking process, preventing the top from browning too quickly.
• Oven Mitts – for safely handling the hot dish.

Each of these tools plays a vital role in making prep smooth and cooking consistent. The skillet helps develop the rich base flavor, while the baking dish ensures even heat distribution for that golden cheese crust.

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Preparation Tips

For best results, use long-grain white rice or jasmine rice that’s already cooked — leftover rice works wonders here. Browning the ground beef until deeply caramelized enhances the meat’s flavor. To deepen the French onion flavor, consider adding a splash of Worcestershire sauce or a bit of beef bouillon to the mix. Always taste your filling before baking to adjust seasoning as needed. And when topping with cheese, a mix of mozzarella and cheddar offers the perfect gooey-meets-golden texture.

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Ingredients for this French Onion Ground Beef Rice Casserole

• 1 lb ground beef
• 1 tablespoon olive oil (if needed)
• 1 small yellow onion, finely diced
• 2 cloves garlic, minced
• 1 can (10.5 oz) French onion soup (condensed)
• 1 can (10.5 oz) cream of mushroom soup
• 1 cup sour cream
• 2 cups cooked white rice (long grain or jasmine)
• 1 tablespoon Worcestershire sauce (optional but recommended)
• 1/2 teaspoon black pepper
• 1/2 teaspoon salt (adjust to taste)
• 1 1/2 cups shredded mozzarella cheese
• 1 cup shredded sharp cheddar cheese
• Fresh parsley, chopped (for garnish)

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Step 1: Brown the Ground Beef

In a large skillet over medium-high heat, cook the ground beef until it’s fully browned, breaking it up with a wooden spoon. If there’s excess grease, drain it. Add diced onions and garlic, and sauté until the onions are soft and translucent.

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Step 2: Add Flavor and Mix Sauces

To the skillet, stir in the French onion soup, cream of mushroom soup, sour cream, Worcestershire sauce, salt, and pepper. Let the mixture simmer for 2-3 minutes, allowing the flavors to meld together.

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Step 3: Combine with Cooked Rice

Add the cooked rice to the skillet and stir everything until thoroughly combined. This is your casserole filling — rich, creamy, and full of flavor.

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Step 4: Assemble in Baking Dish

Preheat your oven to 350°F (175°C). Lightly grease a 9×13-inch baking dish. Pour the beef and rice mixture into the dish, spreading it evenly. Top with a blend of mozzarella and cheddar cheese.

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Step 5: Bake Until Golden and Bubbly

Cover the dish with foil and bake for 20 minutes. Then remove the foil and bake uncovered for an additional 10-15 minutes, or until the cheese is fully melted and golden brown.

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Step 6: Garnish and Serve

Remove from the oven and let rest for 5-10 minutes before serving. Sprinkle with freshly chopped parsley for a pop of color and added freshness. Serve hot and enjoy!

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Notes

This French Onion Ground Beef Rice Casserole is flexible enough to adapt to your taste and pantry. You can swap in ground turkey or chicken for a leaner version. If you’re looking for a more intense onion flavor, sauté an extra onion or use a beefy onion soup mix along with the French onion soup. For extra creaminess, add a splash of heavy cream or a handful of cream cheese into the sauce. This dish can also be made ahead and baked just before serving, making it perfect for meal prep or entertaining.

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Watch Out for These Mistakes While Cooking

• Using uncooked rice: Always use fully cooked rice. Uncooked rice will not soften properly and can throw off the texture.
• Not draining excess fat: Leaving too much grease in the skillet can make the casserole oily and heavy.
• Overbaking the cheese: Baking too long uncovered may dry out the casserole or make the cheese too crisp. Keep an eye on it during the last 10 minutes.
• Skipping seasoning: Taste your filling before baking. Adjust salt, pepper, or Worcestershire to enhance depth.

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Storage Instructions

Allow leftovers to cool completely before storing. Transfer into airtight containers and refrigerate for up to 4 days. To freeze, place portions in freezer-safe containers or bags for up to 2 months. Reheat in the microwave for a few minutes or in the oven at 325°F until heated through. Add a splash of broth or cream if the casserole appears dry after refrigeration.

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Estimated Nutrition (Per Serving – Serves 6)

• Calories: 485
• Protein: 26g
• Carbohydrates: 32g
• Fat: 28g
• Saturated Fat: 13g
• Cholesterol: 95mg
• Sodium: 870mg
• Fiber: 1g
• Sugar: 3g

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Frequently Asked Questions

Can I use brown rice instead of white rice?

Yes, just make sure it’s fully cooked before mixing it into the casserole. It adds a nutty flavor and more fiber.

Can I make this ahead of time?

Absolutely. Assemble the casserole, cover, and refrigerate up to 24 hours in advance. Add 5–10 extra minutes to the baking time.

Is there a way to make this gluten-free?

Yes. Use gluten-free cream of mushroom soup and ensure your French onion soup is also labeled gluten-free.

What can I substitute for sour cream?

Greek yogurt or cream cheese can work well as substitutes depending on your desired texture and flavor.

Can I add vegetables to this casserole?

Definitely. Try adding cooked mushrooms, peas, spinach, or bell peppers for added nutrition and flavor.

How do I make this spicier?

Add crushed red pepper flakes, a chopped jalapeño, or a few dashes of hot sauce to the meat mixture.

Can I freeze the casserole before baking it?

Yes, assemble the casserole in a freezer-safe dish, cover tightly with foil, and freeze for up to 2 months. Thaw overnight in the fridge and bake as directed.

Why is my casserole watery?

Excess moisture can come from undercooked rice or not draining fat. Ensure all ingredients are properly prepped and measured.

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Conclusion

French Onion Ground Beef Rice Casserole is the kind of recipe that brings comfort and convenience together on one plate. With deep savory flavor, creamy texture, and cheesy goodness, it’s an ideal dish for busy weeknights, potlucks, or cozy weekends at home. Whether you stick to the classic or customize it with your favorite add-ins, this casserole is sure to become a household staple.

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