Oven-Baked Cheesy Broccoli and Rice Casserole

This cheesy broccoli and Rice casserole is cozy, easy, and perfect for a weeknight dinner. You’re going to love the Creamy cheddar rice, tender bright-green broccoli, and bubbly golden topping. It turns leftover rice and a head of broccoli into a warm, uncomplicated meal.

Why You’ll Love It

• Creamy and cheesy — cheddar is stirred throughout, with cheddar and Parmesan on top.
• Great for leftover rice — cooked white rice makes this casserole especially easy.
• Tender broccoli — the broccoli is sautéed before baking so it stays tender without turning mushy.
• Weeknight-friendly — familiar ingredients and simple prep make dinner easy.
• Flexible enough for a meal or side — serve it with roasted Chicken or a crisp green salad.

Ingredient Notes

Use cooked white rice here—leftover rice is practically made for this casserole. Freshly cooked rice is fine too, of course, but let it cool a touch so you don’t wind up stirring a steamy glue situation in the bowl. Been there.

For cheddar, shredding a block adds a little extra freshness, but the bagged shredded kind works perfectly well. Sharp cheddar gives more flavor, but medium cheddar has a milder taste.

The sour cream brings a little tang and keeps everything creamy. Full-fat sour cream works especially well because, well, it’s a casserole. We’re not making spa food. You can swap Greek yogurt if that is what you have, but the original sour cream version has that old-fashioned, cozy flavor.

Fresh broccoli is best here, cut into little florets that can actually fit on a fork. Don’t use giant tree branches unless you enjoy picking around vegetables. Do not blanch it separately; the skillet takes care of that. One less pot to wash, praise be.

And parsley at the end may seem like a fussy little flourish, but it brightens up all that cheese. Parsley is not just lawn clippings for casserole.

Ingredients

• 2 cups broccoli florets, chopped into bite-size pieces—not enormous, anyway
• 2 cups cooked white rice, cooled a little if it’s just come off the stove
• 1 1/2 cups shredded cheddar cheese, divided
• 1 cup milk, whatever regular milk you keep around
• 1/2 cup sour cream
• 1 small onion, finely chopped
• 2 cloves garlic, minced
• 2 tablespoons butter
• 1 tablespoon olive oil
• 1 teaspoon salt
• 1/2 teaspoon black pepper
• 1/4 teaspoon paprika
• 1/4 cup grated Parmesan cheese
• 2 tablespoons chopped fresh parsley, for the finish

Instructions

Preheat your Oven to 350°F. Grease a 9-by-13-inch casserole dish. Use butter or cooking spray—whatever is closest and doesn’t require moving three things out of the cabinet.

In a large skillet over medium heat, melt the butter with the olive oil. The olive oil helps keep the butter from getting too brown too fast. Add the onion and garlic, then sauté them for 3 to 4 minutes, until the onion looks translucent and softened. Not browned, not crunchy. Just soft and fragrant.

Add the broccoli florets to the skillet and cook them for another 5 minutes. They should turn a nice bright green and begin to soften around the edges. Keep them moving around the pan now and then. Avoid letting the broccoli go from cheerful green to army-drab. It will still be edible, but not pretty.

In a large mixing bowl, combine the cooked white rice, the sautéed onion, garlic, and broccoli, plus 1 cup of the shredded cheddar, the milk, sour cream, salt, pepper, and paprika. Stir it all together until the rice is coated and the sour cream has worked itself through the mixture. It may look a little loose at this stage—that is normal. The rice and oven will take care of it.

Spoon the mixture into your greased casserole dish and spread it out evenly. No need to press it down like you’re laying patio stones; just level it off with the back of the spoon.

Sprinkle the remaining 1/2 cup cheddar over the top, followed by the Parmesan. That Parmesan gives it those little browned spots that are always tempting even when dinner is not quite ready.

Bake for 25 to 30 minutes, until the casserole is hot and bubbling and the cheese on top is golden brown. Start checking at 25 minutes. Ovens have moods.

Let it sit for a few minutes after you pull it out. Sprinkle on the fresh parsley just before serving. If you scoop it immediately, it will still taste good, but it may slide around on the plate in a way that makes it look less dignified. Again: still tasty.

Variations

Brown rice works nicely here, especially for a slightly nuttier taste, though white rice gives the soft, creamy texture. Greek yogurt can also stand in for the sour cream now and then.

A pinch of cayenne gives it a little kick if that sort of thing appeals, or you can add a whisper of nutmeg for a warmer, old-school casserole flavor. Not much—nutmeg can go from charming to soap aisle in a hurry.

You can make it more of a complete dinner with cooked shredded Chicken or crumbled bacon folded into the rice mixture. A whole bunch of sautéed mushrooms can also work, but cook off enough moisture first so the casserole does not get watery.

Storage & Reheating

Leftovers keep well in the refrigerator for about 3 days, covered tightly. Portion it into containers to avoid leaving a sad little corner in the dish.

Reheat individual servings in the microwave until hot, stirring or rotating if your microwave has those weird cold spots. For a larger portion, cover the casserole dish with foil and warm it in a 350°F oven until heated through. You can uncover it for the last few minutes if you want the top to perk back up.

The broccoli will soften a little more after refrigeration, but it is still very good the next day. Sometimes better, honestly. Broccoli texture still matters—but cold casserole out of the container at noon is also perfectly acceptable.

Final Notes

This is one of those dishes that works for busy evenings, rainy afternoons, and the occasional Sunday when a soft, warm dinner sounds especially good.

Make it when you have leftover rice. Make it when you need something soft and warm and uncomplicated. Put chicken beside it, or don’t. Add cayenne, leave it plain, use the fancy cheddar if it’s on sale.

And if the top gets a little darker than you intended—well. Scrape around the edges, grab a spoon, and carry on.