Golden crumbs on top, creamy rice underneath, and enough broccoli to make this feel like a proper one-dish dinner: this chicken and broccoli rice casserole is built for an evening when you want something warm from the oven. It uses cooked chicken and cooked rice, so the baking time is about heating the filling through and crisping the topping.
The sauce starts with butter, flour and milk rather than condensed soup. Cheddar melts into the sauce, while a little Dijon mustard and garlic keep the filling from tasting flat. Serve it with a simple green salad, or let a generous spoonful be dinner on its own.
Jump to the ingredients and method.
What Makes This Casserole Different
- Cooked rice and chicken: useful for planned leftovers or a freshly cooked batch.
- A homemade sauce: adjust the seasoning to suit your broth and cheese.
- A crisp topping: panko and a little melted butter add contrast to the creamy center.
- One family-size dish: makes about 6 main-course servings.
This is a rice-based casserole rather than a keto recipe. If you are looking for another style of chicken bake, try this keto chicken Parmesan casserole with a different flavor profile.
Creamy Chicken and Broccoli Rice Casserole Recipe
Yield: 6 servings
Prep: about 25 minutes
Bake: 25–30 minutes
Rest: 5 minutes
Total: about 55–60 minutes, starting with cooked chicken and rice.
Equipment: a deep 9 × 13-inch baking dish, a medium saucepan, a pot for the broccoli, a large mixing bowl, a whisk and a food thermometer. Use a dish with enough depth to leave a little space above the filling.
Ingredients
- 3 cups cooked long-grain white rice, about 450 g; measure after cooking
- 3 cups cooked chicken, diced or shredded, about 420 g
- 4 cups small fresh broccoli florets, about 340 g
- 3 tablespoons unsalted butter, about 42 g, plus a little for greasing
- 3 tablespoons all-purpose flour, about 24 g
- 2 cups whole milk, 480 ml
- ½ cup low-sodium chicken broth, 120 ml
- 1½ cups freshly grated sharp cheddar, about 170 g, divided
- 1 teaspoon Dijon mustard
- ½ teaspoon garlic powder
- ½ teaspoon onion powder
- ¼ teaspoon black pepper
- ¼ teaspoon fine salt to start, plus more to taste
- ½ cup plain panko breadcrumbs, about 30 g
- 1 tablespoon unsalted butter, about 14 g, melted, for the topping
Before you start: this method does not cook raw chicken or dry rice. Cook them first, or use properly stored cooked ingredients. The rice should be fluffy rather than wet; the broccoli should be drained thoroughly.
1. Prepare the Dish and Broccoli
Heat a conventional oven to 375°F (190°C). Lightly grease the baking dish. Cut any large broccoli florets into small, similar pieces so each serving gets a little broccoli without one oversized stem taking over.
Bring a pot of water to a boil. Add the broccoli and blanch for about 2 minutes, just until bright green and slightly tender at the edges. Drain thoroughly, then spread it briefly on a clean tray so excess steam can escape. Do not leave water pooling under the florets.
2. Make the Creamy Cheddar Sauce
Melt the 3 tablespoons of butter in the saucepan over medium heat. Whisk in the flour and cook for about 1 minute, stirring, without letting it brown. Gradually whisk in the milk, a little at a time at first, then add the broth.
Bring to a gentle simmer, stirring regularly, and cook for about 3–5 minutes, until the sauce lightly coats the back of a spoon. Lower the heat. Stir in the mustard, garlic powder, onion powder, pepper and initial salt. Remove from the heat and stir in 1 cup of the cheddar until melted. Taste before adding more salt, especially if the chicken or broth is already salty.
3. Combine the Chicken, Rice and Broccoli
Put the cooked rice, cooked chicken and drained broccoli into the large mixing bowl. Add the warm sauce and fold gently until everything is coated. Break up rice clumps with the spoon rather than pressing the mixture into a paste.
The mixture should look moist and spoonable. If your rice is particularly dry and the filling seems stiff, fold in an extra 2–4 tablespoons of milk or broth. Transfer to the prepared dish and spread evenly without packing it down.
4. Add the Cheese and Crumb Topping
Sprinkle the remaining ½ cup cheddar over the filling. In a small bowl, stir the panko with the tablespoon of melted butter, then scatter the crumbs evenly over the cheese.
Keep the topping loose rather than pressing it flat. A light, even layer gives more crisp edges; a thick pile can brown on top while staying soft underneath.
5. Bake Until Hot in the Center
Bake uncovered for about 25–30 minutes, until the edges are bubbling and the crumbs are golden. Check the center with a food thermometer: the casserole should reach 165°F (74°C). The appearance of the topping alone does not tell you whether the middle is hot enough.
If the topping is browning before the center is ready, cover the dish loosely with foil and continue baking. A filling made with refrigerator-cold ingredients may need longer. Rest for 5 minutes before scooping into bowls or onto plates.
Small Changes That Work
- Frozen broccoli: thaw it first, drain thoroughly and pat away excess moisture. Skip the fresh-broccoli blanching step.
- Cooked brown rice: use the same measured cooked volume, with a slightly firmer finished texture.
- Cooked turkey: swap it for the chicken if you have suitable leftovers.
- A gentler topping: omit the panko and use only the reserved cheese; the result will be softer.
For a different vegetable and cheese combination, this spinach chicken casserole with cream cheese and mozzarella is another option for a cozy chicken dinner.
Why Is My Casserole Watery or Dry?
Watery filling usually means extra liquid entered with the vegetables or rice. Drain broccoli well, and avoid using freshly cooked rice that is still sitting in water. Measure the broth rather than adding it by eye.
A dry filling can come from dry rice, too little sauce or extended baking. Keep the filling moist when assembling it, start checking near the lower end of the baking range and use the center temperature to guide doneness.
Make-Ahead, Storage and Reheating
You can assemble the filling up to 24 hours ahead if the cooked chicken and rice are still within their safe storage time. Cover and refrigerate promptly; keep the crumb topping separate until baking. Do not put a refrigerator-cold ceramic or glass dish into a hot oven unless its manufacturer permits that temperature change.
For leftovers, divide the casserole into shallow covered containers and refrigerate within 2 hours, or within 1 hour if the surrounding temperature is above 90°F (32°C). Keep refrigerated at 40°F (4°C) or below and use within 3–4 days. If you started with older cooked chicken or rice, use the earlier storage deadline rather than restarting the clock.
Reheat an individual portion covered in the microwave, stirring or rearranging as needed for even heating, until it reaches 165°F (74°C) throughout. A small splash of milk can loosen the sauce. The panko will soften in storage, so expect a different texture from the first bake.
Frequently Asked Questions
Can I use rotisserie chicken?
Yes. Remove the bones and skin, then measure 3 cups of the cooked meat. Taste the sauce before adding extra salt because rotisserie chicken can already be well seasoned.
Can I put uncooked rice straight into the dish?
No. The liquid amount and baking time here are designed for cooked rice. Dry rice would need a different method and more liquid.
Can I make this gluten-free?
Use a suitable gluten-free flour blend for thickening and gluten-free crumbs, and check the broth, mustard and other packaged ingredients. Sauce thickness can vary with the blend, so add liquid gradually.
What Should I Serve With It?
A green salad with a sharp dressing balances the rich sauce, while roasted carrots or a simple cucumber salad add another texture. You do not need a second starchy side because the rice is already part of the casserole.
If you enjoy this style of dinner, save this old-school chicken and rice casserole for another evening.
