This easy broccoli chicken casserole is a comforting 45-minute dinner made with cooked chicken, tender broccoli, creamy soup sauce, cheddar, Parmesan, and a buttery seasoned breadcrumb topping. Bake it uncovered at 350°F (175°C) for 25 to 30 minutes, then let it stand for 5 minutes before serving.
Every spoonful combines juicy chicken and lightly tender broccoli with a rich, bubbling sauce and a crisp golden top. It serves 6 people and is especially convenient when you use leftover chicken or a store-bought rotisserie chicken.
Jump to RecipeWhy You’ll Love This Recipe
This casserole is the kind of dinner that earns a regular place in a family meal rotation. It uses simple ingredients, requires only 15 minutes of preparation, and bakes in one dish for easier cleanup.
The creamy sauce clings to every piece of chicken and broccoli without overpowering them. Cheddar adds familiar richness, Parmesan brings savory flavor, and the buttered breadcrumbs provide a pleasant contrast to the soft filling.
- Fast preparation: The casserole goes from mixing bowl to oven quickly.
- Flexible protein: Chopped or shredded cooked chicken both work beautifully.
- Family-friendly flavor: Mild cheese and creamy sauce make this approachable for children and adults.
- Complete-feeling meal: Chicken and broccoli provide a satisfying base, with rice available as an optional variation.
If you enjoy comforting chicken dinners, you may also like this cheesy Swiss chicken casserole for another cozy oven-baked option.
Ingredients You’ll Need
The recipe begins with 1 1/2 cups of cooked chicken and 3 cups of broccoli florets. Use leftover roasted chicken, poached chicken, or convenient rotisserie chicken, removing the skin and bones before chopping or shredding.
The creamy base is made with one 10.5-ounce can of condensed cream of chicken soup, 1/2 cup sour cream, 1/2 cup milk, and 1/2 teaspoon garlic powder. This combination creates a thick, savory sauce that coats the filling while baking.
For the cheese layer, you will need 1 cup shredded cheddar, divided, plus 1/2 cup grated Parmesan. Half of the cheddar goes into the filling, while the remaining half melts on top beneath the crunchy breadcrumb finish.
The topping needs 1/2 cup seasoned breadcrumbs and 2 tablespoons melted butter. Stirring the butter into the crumbs helps them brown evenly and adds a warm, savory finish.
- Fresh broccoli should be lightly steamed for about 3 to 4 minutes.
- Frozen broccoli should be thawed and patted dry before mixing.
- Shred cheddar from a block when possible for a smooth melt.
- Measure the breadcrumbs and butter before assembling so the topping is ready to scatter.
For a different comforting casserole idea, take a look at this easy turkey casserole, especially when you have leftover poultry to use.
How to Make It Step-by-Step
Step 1: Heat the oven to 350°F (175°C), then lightly grease a 9-by-13-inch baking dish. Greasing the dish helps the creamy edges release more easily when you serve the casserole.
Step 2: Prepare the broccoli before assembling the filling. Steam fresh florets until just tender, about 3 to 4 minutes, and drain them thoroughly; if you use frozen broccoli, thaw it completely and pat it dry with paper towels.
Step 3: Whisk the condensed cream of chicken soup, sour cream, milk, and garlic powder in a large bowl. Continue stirring until the mixture looks mostly smooth, with the sour cream fully incorporated into the soup base.
Step 4: Add the cooked chicken, prepared broccoli, 1/2 cup of the shredded cheddar, and all of the Parmesan. Fold gently until everything is coated, taking care not to crush the broccoli florets.
Step 5: Spread the filling into the greased baking dish and smooth it into an even layer. Sprinkle the remaining 1/2 cup cheddar over the top so the casserole develops a melted cheese layer.
Step 6: Mix the seasoned breadcrumbs with the 2 tablespoons of melted butter in a small bowl. Scatter the buttered crumbs evenly over the cheese, focusing on covering the surface without packing them down.
Step 7: Bake the casserole uncovered for about 25 to 30 minutes. It is ready when the center is hot, the edges are bubbling, and the top is lightly browned.
Step 8: Remove the dish from the oven and let it stand for 5 minutes before serving. This brief rest allows the sauce to settle so each portion is creamy rather than runny.
For a soup-based chicken dinner with bright Mexican-inspired flavors, you can also try this Mexican chicken tortilla soup.
Pro Tips for the Best Casserole
The most important tip is to remove excess moisture from the broccoli. Water clinging to fresh or frozen florets can thin the sauce and leave the finished casserole watery.
Use cooked chicken and add it directly to the sauce mixture. Since the chicken is already cooked, the oven only needs to heat the casserole and brown the topping; baking much longer than needed can make the chicken dry.
- Keep broccoli tender: Steam fresh florets only until just tender before baking.
- Spread evenly: An even filling and topping help the casserole cook at the same rate.
- Watch the final minutes: Begin checking around 25 minutes for bubbling edges and light browning.
- Rest before serving: Five minutes gives the creamy filling time to firm slightly.
- Use a sheet pan underneath: This can catch any occasional bubbling over the sides of the baking dish.
For a stovetop chicken dinner rather than a baked casserole, this skillet balsamic chicken is another useful weeknight option.
Variations and Serving Ideas
To make the casserole more substantial, fold in about 2 cups of cooked rice along with the chicken and broccoli. Rice absorbs some of the creamy sauce and turns the dish into an even heartier one-dish dinner.
Cream of mushroom soup can replace the cream of chicken soup if you prefer a deeper mushroom flavor or want to change the profile. Monterey Jack or a cheddar blend can also replace some or all of the cheddar for a different cheese finish.
Serve each portion while hot, with a simple green salad or crisp fruit on the side. The casserole already contains chicken and broccoli, so light sides help balance its rich, creamy texture.
For another family-style breakfast or dinner casserole, see this cheesy tater tot casserole with breakfast sausage.
Storage and Reheating
Cool leftover casserole promptly and store it covered in the refrigerator. For the best texture, use leftovers within a few days and reheat individual portions until hot throughout.
Reheat gently rather than baking the entire dish for a long time. Since the chicken is already cooked, excessive reheating can dry the filling and make the broccoli softer than desired.
- Cover the casserole while reheating if the breadcrumb topping begins to brown too quickly.
- Add a small splash of milk to an individual portion if the sauce thickens after chilling.
- Let refrigerated portions warm gradually so the center heats before the top becomes overly dark.
Easy Broccoli Chicken Casserole
Ingredients
Method
- Heat the oven to 350°F (175°C) and lightly grease a 9-by-13-inch baking dish.
- Steam fresh broccoli until just tender, about 3 to 4 minutes, then drain it well. If using frozen broccoli, thaw it completely and pat it dry.
- In a large bowl, whisk together the condensed cream of chicken soup, sour cream, milk, and garlic powder until smooth.
- Fold the cooked chicken, broccoli, 1/2 cup cheddar, and Parmesan into the sauce mixture until the ingredients are evenly coated.
- Spread the mixture evenly in the prepared baking dish, then sprinkle the remaining 1/2 cup cheddar over the surface.
- Combine the seasoned breadcrumbs with the melted butter and scatter the mixture over the cheese.
- Bake uncovered for about 25 to 30 minutes, until hot, bubbling, and lightly browned. Let the casserole stand for 5 minutes before serving.
Notes
Final Thoughts
This easy broccoli chicken casserole brings together everything a dependable dinner should offer: creamy sauce, tender vegetables, cooked chicken, plenty of cheese, and a crisp golden topping. With a 15-minute prep time and about 30 minutes in the oven, it is practical enough for a busy evening while still tasting warm and homemade.
Remember to drain the broccoli well, avoid overbaking, and let the dish rest for 5 minutes before serving. Once you make it, you can keep the classic version or try cooked rice, cream of mushroom soup, or Monterey Jack for a little variety.