When it comes to cozy, feel-good dinners that also happen to be nourishing and easy, it doesn’t get much better than One-Pan Broccoli-Rice Casserole. This recipe cooks up a hearty blend of tender broccoli, creamy cheese, satisfying brown rice, and savory mushrooms—all in a single pan, with minimal fuss and cleanup. Whether you’re feeding your family on busy weeknights or sharing with friends, this lighter version of the comfort food classic brings together wholesome ingredients and irresistible flavors for a meal that’s as simple as it is soul-warming.

One-Pan Broccoli-Rice Casserole Recipe - Recipe Image

Ingredients You’ll Need

The beauty of One-Pan Broccoli-Rice Casserole is that every ingredient truly earns its place, creating layers of flavor and texture. Fresh vegetables, nutty cheese, and perfectly seasoned rice all meld beautifully for a casserole that tastes as good as it looks—no mystery ingredients required.

Olive oil: Adds heart-healthy richness and helps sauté vegetables perfectly.
Yellow onion: Provides a sweet, savory base that deepens the flavor of every spoonful.
Fresh cremini mushrooms: Bring earthy flavor and a meaty texture, making the dish extra satisfying.
Uncooked instant long-grain brown rice: Offers wholesome fiber and nutty flavor, cooking up fluffy in no time.
Kosher salt: Enhances all the subtle notes of the veggies and cheese.
Garlic powder: Delivers gentle savory depth without overpowering the other ingredients.
Dry mustard: Adds a slight tang and rounds out the creamy cheese flavors.
Paprika: Gives a subtle sweetness and beautiful color to the casserole.
Black pepper: Provides warmth and just the right hint of spice.
Chicken broth: Infuses the rice with savory goodness and keeps everything tender and moist. (Substitute with veggie broth for a vegetarian or vegan version!)
Panko breadcrumbs: Create a golden, crispy topping you’ll want on every bite.
Fresh broccoli florets: Bring vibrant color, a gentle crunch, and loads of nutrition.
Colby Jack cheese: Melts beautifully and adds mellow, creamy richness.
Extra-sharp Cheddar cheese: Offers a tangy, bold flavor that stands up to the veggies and rice.

How to Make One-Pan Broccoli-Rice Casserole

Step 1: Sauté the Onion and Mushrooms

Start by heating 2 tablespoons of olive oil in a large skillet over medium-high heat. Add the chopped onion and sliced cremini mushrooms, then cook for about 7–8 minutes, stirring occasionally, until they’re softened and beautifully golden. This step is where the flavor magic starts, as the onions get sweet and the mushrooms deep and savory.

Step 2: Toast the Rice and Seasonings

Now, add the uncooked instant brown rice right into the skillet, along with kosher salt, garlic powder, dry mustard, paprika, and black pepper. Stir constantly for about a minute, letting the rice get coated in the oil and seasonings—this step unlocks extra nuttiness in the rice and ensures every grain is loaded with flavor.

Step 3: Simmer with Broth

Pour in the chicken broth, give everything a good stir, and bring the mixture to a boil. Once it’s bubbling, reduce the heat to medium, cover the skillet, and let it simmer for 8 minutes. The rice will begin to absorb all that savory broth, transforming into the casserole’s hearty backbone.

Step 4: Prepare the Crunchy Topping

While the rice simmers, mix the panko breadcrumbs with the remaining tablespoon of olive oil in a small bowl. This little step is what creates the magical, golden crunch on top of your One-Pan Broccoli-Rice Casserole. Set the mixture aside for the grand finish.

Step 5: Stir in the Broccoli

Lift the lid and stir the fresh broccoli florets into the skillet. Cover it back up and let everything simmer together for another 5–7 minutes. The broccoli will brighten in color and become perfectly tender, while the rice finishes cooking until fluffy and flavorful.

Step 6: Melt in the Colby Jack

Remove the skillet from the heat and add the shredded Colby Jack cheese. Stir gently until the cheese melts fully into the hot rice and veggie mixture—this step makes everything creamy and irresistible.

Step 7: Broil the Topping

Sprinkle the extra-sharp Cheddar cheese and the reserved panko mixture evenly over the casserole. Preheat your broiler with the oven rack about 5 inches from the heat, then broil for about 2 minutes. Watch carefully as the top turns golden brown and crunchy, sending cheesy aromas through your kitchen. Let it cool slightly, then dig in!

How to Serve One-Pan Broccoli-Rice Casserole

Garnishes

For a picture-perfect finish, sprinkle freshly chopped parsley, a pinch of paprika, or a little extra shredded cheese right before serving. These easy garnishes add vibrant color and a touch of freshness that make the One-Pan Broccoli-Rice Casserole truly sing at the table.

Side Dishes

This casserole is wonderfully satisfying as a meal on its own, but if you want to round out your menu, pair it with a simple green salad, a side of roasted carrots, or warm crusty bread. A citrusy vinaigrette or a scoop of tangy coleslaw can add brightness and keep things balanced.

Creative Ways to Present

Try scooping your One-Pan Broccoli-Rice Casserole into individual ramekins for an elegant dinner-party twist, or serve it family-style in the skillet straight from oven to table. For a cozy brunch, pair smaller portions with poached eggs—trust me, it’s a game-changer!

Make Ahead and Storage

Storing Leftovers

Once cooled, transfer any leftover casserole to an airtight container and refrigerate. It keeps beautifully for up to 4 days, making it perfect for meal prep or lunchbox leftovers throughout the week—if you manage to have any left!

Freezing

One-Pan Broccoli-Rice Casserole freezes surprisingly well. Wrap portions tightly or use freezer containers, then stash them away for up to three months. Thaw overnight in the fridge before reheating for best texture.

Reheating

To reheat, either microwave individual servings until hot, or warm larger portions in a covered ovenproof dish at 350 degrees Fahrenheit until bubbly. For extra crispness, run the casserole under the broiler for a minute or two before serving.

FAQs

Can I make this casserole vegan?

Absolutely! Swap chicken broth for vegetable broth and use your favorite plant-based cheeses. The One-Pan Broccoli-Rice Casserole is just as comforting and flavorful when made vegan.

Can I use frozen broccoli instead of fresh?

You sure can. Just thaw and drain the frozen broccoli before adding it. This shortcut makes the recipe even more convenient, with only a slight difference in texture.

How do I add protein for a heartier meal?

For extra protein, stir in diced cooked chicken or turkey after the rice is cooked, right before melting in the cheese. This turns the One-Pan Broccoli-Rice Casserole into an even heartier main dish!

What if I don’t have instant brown rice?

You can use regular brown rice, but you’ll need to increase the liquid and cooking time—about double for both. Or, substitute with white rice, adjusting for doneness as needed. Keep an eye on the pan and taste as you go.

Can I prepare One-Pan Broccoli-Rice Casserole ahead of time?

Yes, assemble the casserole up to the broiling step, cover, and refrigerate for a day. When you’re ready to serve, let it come to room temperature, sprinkle with the Cheddar and panko, and broil until golden.

Final Thoughts

If you’re searching for a wholesome, crowd-pleasing dinner that doesn’t leave you with a mountain of dishes, give this One-Pan Broccoli-Rice Casserole a spot on your table. It’s family-tested, endlessly customizable, and loaded with flavors you’ll want to enjoy again and again. Gather your ingredients and make tonight a casserole night—you won’t regret it!