High Protein Chicken Broccoli Rice Casserole

This High Protein Chicken Broccoli Rice Casserole is creamy, cheesy, and packed with flavor.

It has tender chicken, fluffy rice, and fresh broccoli in a rich, cheesy sauce.

The best part? You can make it in just 30 minutes using simple ingredients.

It’s the kind of easy dinner that fills you up, tastes amazing, and makes everyone want seconds!

Why I Love This Recipe

I started making chicken and broccoli rice casseroles when I wanted something filling but didn’t feel like spending all evening in the kitchen. I love creamy casseroles, but some versions use a lot of heavy cream and butter.

So I tried making a lighter version with Greek yogurt, chicken breast, and just enough cheddar cheese to keep that rich, comforting taste.

After a few changes, this became one of my favorite quick dinners. It has everything I want in one dish, and cleanup is easy, too.

Here’s why I keep coming back to it:

• High in protein: Chicken breast, Greek yogurt, and cheddar cheese provide plenty of protein.
• Ready in 30 minutes: Great for busy weeknights when you need dinner fast.
• One-pan comfort food: Everything comes together in one skillet.
• Creamy without heavy cream: Greek yogurt makes the sauce rich and smooth.
• Easy to customize: You can swap the rice, vegetables, or cheese.
• Great for meal prep: The leftovers taste delicious the next day.

It’s simple food, but every bite feels warm and comforting.

What You’ll Need

Recipe details

Total Time

30 minutes

Cook Time

20 minutes

Servings

4

Prep Time: 10 minutes

Cooking Method: Stovetop

Difficulty: Easy

Ingredients

For the Chicken and Rice:

• 1 lb (450 g) boneless, skinless chicken breast, cut into bite-sized pieces
• 2 cups cooked white rice (preferably warm)
• 3 cups fresh broccoli florets, cut into small pieces
• 1 tablespoon olive oil
• 1 teaspoon garlic powder
• 1 teaspoon onion powder
• ½ teaspoon smoked paprika
• ½ teaspoon salt
• ¼ teaspoon black pepper

For the Creamy Cheese Sauce:

• ¾ cup plain Greek yogurt (2% or full-fat)
• ½ cup low-sodium chicken broth
• 1 cup shredded sharp cheddar cheese, divided into ¾ cup and ¼ cup
• ¼ cup grated Parmesan cheese
• 1 teaspoon Dijon mustard
• 1 tablespoon cornstarch
• 2 tablespoons water

For Garnish:

– 1 tablespoon fresh parsley, finely chopped (optional)

Tools You Need

You don’t need any fancy equipment to make this casserole.

• Large deep stainless steel skillet with a fitted lid
• Wooden spatula
• Silicone whisk
• Chef’s knife
• Cutting board
• Measuring cups and spoons
• Small mixing bowls
• Digital meat thermometer (recommended)

A deep skillet is especially helpful because it gives you enough space to mix everything without spilling.

How to Make High Protein Chicken Broccoli Rice Casserole

This recipe uses already-cooked rice to keep dinner quick. Have all your ingredients measured and ready before you start.

Step 1: Season the Chicken

Place 1 lb of bite-sized chicken breast pieces in a mixing bowl.

Add:

• 1 teaspoon garlic powder
• 1 teaspoon onion powder
• ½ teaspoon smoked paprika
• ½ teaspoon salt
• ¼ teaspoon black pepper

Toss well until every piece of chicken is evenly coated with seasoning.

Step 2: Cook the Chicken

Heat 1 tablespoon olive oil in a large deep stainless steel skillet over medium-high heat.

Add the seasoned chicken in a single layer.

Cook until golden brown, turning the pieces so they cook evenly.

Check that the thickest pieces reach 165°F (74°C).

Transfer the cooked chicken to a clean plate and set aside.

Step 3: Steam the Broccoli

Place 3 cups of small fresh broccoli florets in the same skillet.

Add ¼ cup of the measured chicken broth.

Cover with the fitted lid and let the broccoli steam until bright green and just tender.

Remove the lid. If any liquid remains, let it cook off.

Transfer the broccoli to the plate with the cooked chicken.

Step 4: Make the Creamy Sauce

In a small mixing bowl, whisk together:

• ¾ cup plain Greek yogurt
• Remaining ¼ cup low-sodium chicken broth
• 1 teaspoon Dijon mustard
• 1 tablespoon cornstarch
• 2 tablespoons water

Whisk until smooth, with no visible lumps.

The sauce should look creamy and easy to pour.

Step 5: Warm the Sauce and Melt the Cheese

Reduce the skillet to low heat.

Pour in the creamy yogurt mixture and stir gently until it starts to thicken.

Add:

• ¾ cup shredded sharp cheddar cheese
• ¼ cup grated Parmesan cheese

Stir until smooth and creamy.

Keep the heat low and do not let the sauce boil, or the yogurt may separate.

Step 6: Add the Chicken, Broccoli, and Rice

Add the following to the creamy cheese sauce:

• 1 lb cooked, seasoned chicken breast pieces
• 3 cups steamed broccoli florets
• 2 cups cooked white rice

Gently fold everything together until the chicken, broccoli, and rice are evenly coated.

Keep the skillet over low heat until everything is warmed through.

Step 7: Add the Final Cheese Topping

Sprinkle the remaining ¼ cup shredded sharp cheddar cheese evenly over the casserole.

Cover the skillet with the lid and let the cheese melt completely over low heat.

Remove the lid once the cheese is soft and gooey.

Step 8: Garnish and Serve

Turn off the heat.

Sprinkle 1 tablespoon finely chopped fresh parsley over the casserole, if using.

Spoon the creamy chicken broccoli rice casserole into round serving bowls.

Serve warm while the cheese is creamy and melted.

Pro Tips

• Use cooked rice: This is the secret to keeping the recipe quick. Freshly cooked rice, leftover rice, or microwave-ready rice all work. Reheat chilled rice until steaming hot.
• Cut chicken into equal pieces: This helps every piece cook evenly and stay tender.
• Keep the sauce on low heat: Greek yogurt can separate if it gets too hot. Gentle heat keeps everything creamy.
• Shred your own cheddar: Cheese from a block usually melts more smoothly than pre-shredded cheese.
• Don’t overcook the broccoli: You want it tender but still bright green, not soft and mushy.

Why This Recipe Works (Quick Science)

There’s a reason this casserole turns out creamy and filling without using heavy cream.

1. Chicken provides lean protein.

Chicken breast is packed with protein, which helps make this meal satisfying.

2. Greek yogurt makes the sauce creamy.

Greek yogurt contains protein and gives the sauce a thick, rich texture. Full-fat or 2% yogurt works especially well because it is less likely to turn grainy when heated.

3. Cornstarch helps the sauce stay smooth.

Cornstarch thickens the liquid and helps the sauce hold together. It also makes the cheese sauce cling to the chicken, rice, and broccoli.

4. Cheddar cheese adds flavor and richness.

Sharp cheddar has a strong flavor, so you don’t need a huge amount to make the casserole taste cheesy.

5. Cooked rice keeps the recipe fast.

Starting with cooked rice removes the need to simmer uncooked rice in the skillet. It also helps prevent the broccoli and chicken from overcooking.

Substitutions and Variations

You can easily change this casserole based on what you have in your kitchen.

• Brown rice: Replace white rice with 2 cups cooked brown rice for a nuttier taste and more fiber.
• Cauliflower rice: Use 2 cups cooked, well-drained cauliflower rice for a lower-carb version.
• Rotisserie chicken: Use about 3 cups shredded cooked chicken instead of raw chicken breast. Skip the chicken-cooking step.
• Frozen broccoli: Replace fresh broccoli with 3 cups frozen broccoli florets. Steam until tender, then drain well.
• Mozzarella cheese: Replace some cheddar with mozzarella for a mild flavor and stretchy cheese.
• Cottage cheese: Blend ¾ cup cottage cheese until smooth and use it instead of Greek yogurt.
• Extra vegetables: Add cooked mushrooms, peas, or diced carrots.
• Spicy version: Add ¼ teaspoon red pepper flakes or a little hot sauce.

If you add extra vegetables, make sure to cook off their excess moisture so the sauce doesn’t become watery.

Common Mistakes to Avoid

1. Cooking the yogurt sauce over high heat

This can make the sauce look grainy or separated.

Fix: Keep the heat low and stir gently.

2. Adding raw rice

Raw rice needs extra liquid and cooking time, so it won’t work well in this quick recipe.

Fix: Use fully cooked rice.

3. Overcooking the chicken

Chicken breast can become dry when cooked too long.

Fix: Cut the chicken evenly and cook it just until it reaches 165°F (74°C).

4. Leaving too much water in the broccoli

Extra moisture can make the casserole thin and watery.

Fix: Let leftover steaming liquid cook off before adding the sauce.

5. Adding all the cheese at once over high heat

The sauce may become oily or clumpy.

Fix: Add the cheese gradually over low heat and stir until smooth.

What to Serve With

This casserole is already a complete meal, but a simple side can make dinner even better.

• Simple green salad: Fresh lettuce, cucumber, and a little vinaigrette add a nice crunch.
• Garlic bread: Perfect for scooping up extra creamy cheese sauce.
• Roasted carrots: Their natural sweetness goes well with the cheesy casserole.
• Cucumber and tomato salad: A fresh, cool side that balances the rich flavor.
• Fresh fruit: Apple slices, grapes, or berries make an easy finish.

I usually serve this casserole with a simple salad because the main dish is already so filling.

Make-Ahead Tips

This recipe is great when you want to prepare dinner in advance.

• Cook the chicken early: Season and cook the chicken ahead, then refrigerate it in a sealed container.
• Prepare the rice: Cook the rice in advance, cool it quickly, and store it in the refrigerator.
• Chop the broccoli: Wash and cut the broccoli ahead so it’s ready to steam.
• Shred the cheese: Measure and store the cheddar and Parmesan in the refrigerator.
• Mix the sauce ingredients: Whisk the Greek yogurt, broth, mustard, cornstarch, and water together shortly before cooking.

For the best texture, make the cheese sauce and combine everything just before serving.

Leftovers and Storage

Refrigerator

Let the casserole cool slightly, then transfer it into airtight containers.

Store in the refrigerator for up to 3–4 days. Refrigerate within 2 hours of cooking.

Freezer

You can freeze this casserole for up to 2 months.

However, the Greek yogurt sauce may change texture after thawing, becoming slightly grainy.

For the best results, freeze the cooked chicken, broccoli, and rice separately, then make the cheese sauce fresh.

Reheating

Add a small splash of chicken broth or water to help loosen the sauce.

Reheat in a skillet over low heat, stirring gently until steaming hot throughout and reaching 165°F (74°C).

You can also reheat individual portions in the microwave, stirring partway through.

Meal Prep

Divide the casserole into 4 airtight containers for easy lunches.

Keep refrigerated and reheat thoroughly before eating.

Macros Information

Estimated Nutrition Per Serving

Based on 4 servings, using 2% plain Greek yogurt and the listed ingredients.

Calories

~480 kcal

Protein

~46 g

Carbohydrates

~35 g

Fat

~17 g

Fiber

~3 g

Servings

4

These numbers are estimates. The exact macros will depend on your chicken, yogurt, cheese, rice, and portion sizes.

For even more protein, use a high-protein Greek yogurt or serve the casserole with a little extra grilled chicken.

Frequently Asked Questions

Q: Can I use rotisserie chicken instead of raw chicken breast?

A: Yes! Use about 3 cups shredded rotisserie chicken. Since it’s already cooked, you can skip the chicken-cooking step and add it when combining the rice and broccoli.

Q: Can I use frozen broccoli?

A: Absolutely. Use 3 cups frozen broccoli florets. Cook them until tender and drain off the extra water before mixing them into the casserole.

Q: Can I make this casserole without Greek yogurt?

A: Yes. You can use blended cottage cheese or a thick, plain cream-based sauce. The taste and protein amount will change, but the casserole can still be delicious.

Q: Can I use uncooked rice?

A: Not in this 30-minute version. Uncooked rice needs more liquid and extra cooking time. Use cooked rice for the best results.

Q: Is this recipe good for meal prep?

A: Yes! Divide it into airtight containers and refrigerate for up to 3–4 days. It makes a filling lunch that reheats well.

Q: How can I make the casserole even higher in protein?

A: Add extra cooked chicken breast, use protein-rich Greek yogurt, or mix in a little more blended cottage cheese. You may need a splash of broth to keep the sauce creamy.

Q: Can I bake this casserole instead?

A: Yes. Once everything is cooked and mixed together, transfer it to an oven-safe baking dish. Sprinkle the final cheddar cheese on top and bake at 375°F (190°C) until heated through and the cheese has melted. Keep an eye on it so the sauce doesn’t dry out.

Q: Why did my cheese sauce turn grainy?

A: The heat was probably too high. Greek yogurt and cheese can separate when overheated. Next time, use low heat and stir gently. Full-fat or 2% Greek yogurt can also help.

Q: Can I make this recipe gluten-free?

A: Yes. The main ingredients are naturally gluten-free, but check the labels on your broth, Dijon mustard, spices, and any packaged ingredients to make sure they are certified or labeled gluten-free when needed.

Q: Can I double the recipe?

A: Yes! Double all the ingredients and use a very large deep skillet or cook in two batches. Make sure the chicken is fully cooked and everything is evenly heated before serving.

Final Thoughts

This High Protein Chicken Broccoli Rice Casserole is proof that a simple dinner can be creamy, cheesy, filling, and packed with protein.

I love how everything comes together in one skillet with ingredients that are easy to find. The juicy chicken, tender broccoli, fluffy rice, and rich cheese sauce make every bite comforting without feeling too heavy.

Whether you’re making a quick weeknight dinner or prepping lunches for the week, this is one of those recipes you’ll want to keep.

Give it a try, make it your own, and don’t forget to leave a comment below! I’d love to hear how your casserole turned out, what changes you made, and any questions you have.

Happy cooking!