Name: French Onion Beefy Rice Casserole Recipe
Prep time: 10 min
Cook time: 50 min
Total time: 1 h
Cuisine: American
Ingredients: 16 ounces lean ground beef (96% lean / 4% fat); ½ teaspoon ground black pepper; 1 teaspoon Italian herbs; ½ teaspoon dried thyme; 3 tablespoons unsalted butter; 1 large Vidalia onion, thinly sliced; 1 clove garlic, minced; 1 cup sliced mushrooms; 1 tablespoon balsamic vinegar; 1 ounce onion soup mix (1 pouch); 2½ cups beef broth; 1¼ cups white long-grain rice (do not substitute); ½ cup whole milk; 1¼ cups sour cream; 2 cups shredded cheese (your favorite kind)

Jump to Recipe· 4.2 from 3 reviews

There is something incredibly satisfying about a home-cooked casserole that manages to deliver rich layers of flavor while being easy enough to whip up on a busy weeknight. The French Onion Beefy Rice Casserole Recipe is exactly that kind of dish—a harmonious blend of savory ground beef, sweet caramelized onions, tender mushrooms, and creamy rice all baked to perfection with a generous blanket of melted cheese. It’s the kind of comfort food you can rely on to warm your soul and impress family and friends alike.

Ingredients You’ll Need

The image shows a top view of a large silver cooking pot on a white marbled surface. Inside the pot, there are two flat layers of raw red meat strips placed next to each other, with the texture showing small, fine lines from the meat fibers. A woman's hand is holding a wooden spatula with three slits, pressing down gently on the meat near the right side of the pot. On the upper right side of the image, there is a clear glass bowl filled with thin, white, circular onion slices. To the left of the pot, a white and red striped cloth is partially folded and laid on the white marbled surface. photo taken with an iphone --ar 4:5 --v 7

Gathering the right ingredients for the French Onion Beefy Rice Casserole Recipe is surprisingly straightforward. Each component plays an essential role, enhancing texture, flavor, and that irresistible aroma that fills your kitchen.

Lean ground beef (16 ounces, 96% lean / 4% fat): Provides hearty protein without excess grease, giving the casserole a rich, meaty base.
Ground black pepper (½ teaspoon): Adds subtle heat and depth to balance the savory ingredients.
Italian herbs (1 teaspoon): A fragrant blend that complements the beef and vegetables beautifully.
Dried thyme (½ teaspoon): Lends a delicate earthiness that enhances the overall flavor profile.
Unsalted butter (3 tablespoons): Used for caramelizing onions and adding smooth richness.
Onion soup mix (1 ounce pouch): The secret seasoning that ties in intense onion flavor and savory notes.
Garlic clove, minced (1): Injects a fresh, aromatic kick.
Large Vidalia onion, thinly sliced (1): Naturally sweet and perfect for caramelizing to deepen flavor.
Beef broth (2½ cups): Provides moisture and a rich base for cooking rice and melding flavors.
White long-grain rice (1¼ cups): The ideal texture is essential here—do not substitute as other types may not cook properly.
Sliced mushrooms (1 cup): Adds an earthy, meaty texture that complements the beef.
Whole milk (½ cup): Creates creaminess and smooths out the casserole’s texture.
Sour cream (1¼ cups): Adds tanginess and a luscious, rich creaminess to bind everything together.
Shredded cheese (2 cups, your favorite kind): Melts on top, creating a golden, gooey crust that is simply irresistible.
Balsamic vinegar (1 tablespoon): Balances the sweetness of onions with a subtle tang.

How to Make French Onion Beefy Rice Casserole Recipe

Step 1: Brown the Beef and Season

Begin by heating a large skillet or pot over medium heat. Brown your lean ground beef, carefully seasoning it with black pepper, Italian herbs, and thyme. Cooking the beef first lets you build that hearty flavor foundation that will carry the dish. Once the beef is fully cooked, set it aside—it’s time to transform those onions.

Step 2: Caramelize the Onions

In the same pot, melt unsalted butter and add thinly sliced Vidalia onions. Cook them gently until they soften, about five minutes. Then, stir in balsamic vinegar and garlic, letting the mixture cook for another minute. This step is where the sweet and tangy character of the casserole really begins to shine.

Step 3: Combine Rice, Mushrooms, and Broth

Next, toss in the sliced mushrooms, onion soup mix, beef broth, and white long-grain rice. Stir everything well to combine evenly. Bringing this mixture to a boil before lowering the heat and simmering under a cover is crucial—it allows the rice to absorb the rich flavors without stirring and breaking down the grains too much.

Step 4: Preheat Oven and Finish the Mixture

While the rice simmers for about 10 minutes, preheat your oven to 350°F (175°C). Once simmered, fold the browned ground beef back into the pot along with sour cream, whole milk, and half of your shredded cheese. The blend of creamy ingredients with cheese creates a luscious sauce binding the casserole ingredients together perfectly.

Step 5: Bake Until Golden and Bubbling

Transfer everything into a 9 × 13-inch casserole dish and sprinkle the remaining shredded cheese evenly on top. Baking uncovered for 20 minutes will give you that perfect golden-bubbly finish. The cheese melts to a light golden crust, providing a delightful contrast to the creamy, savory layers below.

How to Serve French Onion Beefy Rice Casserole Recipe

The image shows a square white baking dish filled with a baked casserole that has a golden brown melted cheese layer on top, with bits of green herbs scattered over it. Next to the baking dish, there is a round white plate with a single serving of the casserole plated in the center, revealing layers of mixed grains, chickpeas, and small orange and green vegetable pieces, topped with some green herbs. A silver fork rests on the plate near the casserole. A wooden spatula is lying inside the baking dish, partially covered in the casserole. To the left of the plate and baking dish, there is a red and white striped cloth on a white marbled surface. The photo taken with an iphone --ar 4:5 --v 7

Garnishes

A sprinkle of freshly chopped parsley or a few thinly sliced green onions on top adds a fresh, vibrant pop of color and flavor that brightens the rich, hearty casserole. These simple garnishes invite a touch of elegance and a slight herbal lift.

Side Dishes

This casserole is a complete meal, but if you want to create an even bigger spread, consider serving it alongside a crisp green salad or roasted seasonal vegetables. Simple steamed broccoli or a refreshing cucumber salad can balance the richness nicely without overpowering the savory goodness of the casserole.

Creative Ways to Present

For a charming presentation, serve this casserole family-style straight from the baking dish, allowing everyone to scoop their portion. Alternatively, using decorative ramekins or individual casserole dishes can elevate the experience, making it feel extra special for gatherings or cozy dinners at home.

Make Ahead and Storage

Storing Leftovers

Leftover French Onion Beefy Rice Casserole Recipe keeps wonderfully in the refrigerator for up to 3 days. Store it in an airtight container to maintain moisture and freshness, ensuring each reheated portion tastes just as comforting as the first.

Freezing

You can freeze the casserole to enjoy later by placing it in a freezer-safe container or wrapping it carefully with foil and plastic wrap. It will maintain its quality for up to 2 months. Just be sure to thaw it overnight in the refrigerator before reheating.

Reheating

Reheat individual portions gently in the microwave or warm the whole casserole in the oven at 325°F (160°C) until heated through and bubbly. Covering it with foil while reheating helps keep the moisture locked in, preventing it from drying out.

FAQs

Can I use a different type of rice in this casserole?

It’s best to stick with white long-grain rice as indicated in the French Onion Beefy Rice Casserole Recipe. Other types of rice, like brown or short-grain, have different cooking times and moisture absorption, which might upset the texture and consistency of the casserole.

Is it possible to make this recipe vegetarian?

Absolutely! Substitute the ground beef with a plant-based protein or extra mushrooms. Use vegetable broth instead of beef broth, and make sure your cheese and sour cream are vegetarian-friendly. The flavors will still be rich and satisfying.

Can I prepare this casserole a day in advance?

Yes, preparing the mixture ahead of time and refrigerating it overnight works well. Just add the cheese topping and bake right before serving to keep that luscious, melted finish.

What type of cheese works best in this recipe?

Cheddar, Monterey Jack, or a blend of mozzarella and Swiss are all fantastic options. Choose a cheese that melts well and complements the savory onions and beef flavors.

How can I add extra vegetables to the casserole?

Feel free to toss in diced bell peppers, spinach, or shredded carrots when you add the mushrooms for an added nutritional boost. Just be mindful that adding too many watery veggies may affect the overall texture.

Final Thoughts

Nothing beats the warmth and comforting flavors of the French Onion Beefy Rice Casserole Recipe, especially on chilly evenings or when you simply want a satisfying meal with minimal fuss. Once you try it, I’m sure it will become one of your go-to favorites to share and savor again and again.