This baked potato chicken and broccoli casserole is a warm, filling dish that brings together creamy potatoes, tender chicken, and fresh broccoli in one satisfying bake. It’s the kind of comforting meal that works just as well for a relaxed family dinner as it does for sharing at a gathering.

Why You’ll Love This Recipe

This casserole is rich, hearty, and packed with familiar flavors everyone enjoys. The creamy mashed potatoes form a comforting base, while seasoned chicken and broccoli add balance and texture. It’s a complete meal in one dish, easy to prepare ahead of time, and perfect for feeding a crowd without stress.

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

3 pounds red potatoes, cut into 1-inch pieces
4 tablespoons unsalted butter, softened
1 cup sour cream
1/2 cup whole milk
1 1/2 teaspoons salt
1/2 teaspoon black pepper
1 teaspoon garlic powder
2 cups cooked chicken breast, diced or shredded
1 1/2 cups broccoli florets, lightly steamed and chopped
1 cup smoked turkey strips, finely chopped
2 cups shredded cheddar cheese
1/2 cup shredded mozzarella cheese
2 tablespoons chopped green onions (optional)

Directions

Preheat your oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish and set aside.
Place the potatoes in a large pot and cover with cold water. Bring to a boil, then simmer for 15–18 minutes, or until the potatoes are fork-tender. Drain well.
Mash the hot potatoes with butter, sour cream, milk, salt, pepper, and garlic powder until smooth and creamy.
Fold in the cooked chicken, broccoli, smoked turkey strips, and half of the cheddar cheese. Mix gently until evenly combined.
Spread the mixture evenly into the prepared baking dish.
Sprinkle the remaining cheddar cheese and all of the mozzarella cheese over the top.
Bake uncovered for 25–30 minutes, or until the casserole is heated through and the cheese is melted and lightly golden.
Let rest for 5 minutes before serving. Garnish with chopped green onions if desired.

Servings and timing

Servings: 6 to 8 servings
Prep time: 25 minutes
Cook time: 30 minutes
Total time: 55 minutes

Variations

Swap red potatoes with Yukon gold potatoes for an extra creamy texture.
Add sautéed onions or mushrooms for deeper savory flavor.
Use cooked rotisserie-style chicken seasoned with mild spices for added taste.
Replace cheddar with Colby Jack or a mild white cheese for a different cheese profile.
Add a pinch of paprika or dried herbs to the potato mixture for subtle seasoning.

Storage/Reheating

Store leftover casserole in an airtight container in the refrigerator for up to 3 days. To reheat, warm individual portions in the microwave for 1–2 minutes, or reheat the entire dish covered in the oven at 350°F (175°C) until heated through. Add a splash of milk if the casserole seems dry.

FAQs

Can I make this casserole ahead of time?

Yes, you can assemble the casserole up to one day in advance, cover it tightly, and refrigerate. Bake just before serving.

Can I freeze this casserole?

Yes, let it cool completely, then freeze in an airtight container for up to 2 months. Thaw overnight in the refrigerator before reheating.

What kind of chicken works best?

Cooked chicken breast works best, but chicken thighs can also be used for a juicier texture.

Do I have to steam the broccoli first?

Lightly steaming the broccoli helps keep it tender and prevents excess moisture during baking.

Can I use frozen broccoli?

Yes, thaw it completely and squeeze out excess moisture before adding it to the casserole.

How do I keep the potatoes from being gluey?

Avoid over-mashing and use a potato masher instead of a food processor.

Can I make this dish lighter?

You can use low-fat milk and reduced-fat cheese, but the texture may be slightly less creamy.

What can I serve with this casserole?

A fresh green salad or simple roasted vegetables pair well with this dish.

Is this casserole spicy?

No, it’s mild. You can add chili flakes or mild spices if you want a little heat.

Can I bake this in a smaller dish?

Yes, but the casserole may be thicker and require a few extra minutes of baking time.

Conclusion

This baked potato chicken and broccoli casserole is a comforting, all-in-one meal that’s both practical and satisfying. With its creamy texture, balanced ingredients, and simple preparation, it’s a reliable recipe you’ll want to make again and again for family dinners or casual gatherings.