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Poppy Seed Chicken Casserole

5 from 2 votes
Anna AlleeBy Anna Allee
Anna Allee
Anna Allee Food Writer

Passionate writer, editor, traveler and foodie, specializing in North American, European, Asian and Australian cuisines.

Expertise: Decadent Desserts, International Cuisine View all posts →
Jump to Recipe

Say goodbye to boring dinners and hello to this creamy, cheesy dish—where comfort meets a delicious twist!

Poppy Seed Chicken Casserole with broccoli and a crispy topping, being scooped from a green dish.

Imagine a dish that’s creamy, cheesy, and just the right amount of tangy—all wrapped up in one warm, satisfying casserole. That’s exactly what this poppy seed chicken casserole delivers! Now, I know what you’re thinking. The word “casserole” alone can be enough to make kids wrinkle their noses and run for cover. Casseroles are often the forgotten leftovers of the dinner world, served up on cold nights when no one’s in the mood for anything exciting. But trust me on this one—this casserole is about to change all that. With tender chicken breasts, crisp broccoli florets, and a creamy mix of cheddar cheese, sour cream, and Dijon mustard, this dish is anything but boring.

So go ahead, call it a casserole. But watch as your kids (or young ones you’re cooking for) take one bite and completely rethink their stance. This dish is so irresistible, you might just find yourself making it every week, with NO complaints at the dinner table! Whether it’s a weeknight dinner or potluck contribution, this poppy seed chicken casserole is sure to become a new favorite.

Ingredients for Poppy Seed Chicken Casserole: diced chicken, broccoli, shredded cheddar cheese, flour, butter, milk, and breadcrumbs.

Is This Poppy Seed Chicken Casserole Healthy?

While this poppy seed chicken casserole might not be the first thing you think of when it comes to “light” meals, it strikes a nice balance between indulgent comfort and wholesome ingredients. Chicken breast provides lean protein, while broccoli florets offer a healthy dose of vitamins and fiber. The creamy base, made with a mix of sour cream, cheddar cheese, and a bit of butter, is rich and satisfying but can be lightened up by adjusting the amount of cheese or swapping in a lighter sour cream. The poppy seeds, though small, add healthy fats, fiber, and antioxidants. Like many casseroles, it’s versatile, and you can easily tweak the ingredients to make it suit your dietary preferences without sacrificing flavor!

Can I Use Different Breadcrumbs Besides Panko?

Panko breadcrumbs are a popular choice for casseroles because of their light, crispy texture, which adds a delightful crunch to the top of this dish. However, they’re not required for this poppy seed chicken casserole. So if you don’t have panko on hand, you can easily substitute with regular breadcrumbs. That being said, while regular breadcrumbs will provide a nice topping, they may be finer and less airy than panko.

For a healthier option, whole-wheat breadcrumbs can be used to add extra fiber. Alternatively, if you’re gluten-free, gluten-free breadcrumbs or even crushed gluten-free crackers will work just as well. Whichever you choose, the goal is to add a satisfying crunch, so feel free to get creative with your breadcrumb options!

Poppy Seed Chicken Casserole with chicken, broccoli, and a crispy golden-brown breadcrumb topping.

How Do I Store Leftovers?

Let the casserole cool completely. Cover it with plastic wrap or put it in an airtight container. It should keep for up to 4 days in the fridge. You can also freeze the casserole. Put it in an airtight container or cover it with plastic wrap and then aluminum foil. It should keep in the freezer for up to 3 months. To reheat, thaw it in the fridge overnight first. Then, warm in the oven or microwave until heated through.

Poppy Seed Chicken Casserole with a golden breadcrumb topping, chicken, and broccoli.

Serving Suggestions

This poppy seed chicken casserole is a hearty, comforting dish that pairs wonderfully with a variety of side dishes to round out your meal. For a fresh, light contrast, try serving it alongside a Spinach Salad. Cooked vegetables, such as Glazed Stovetop Carrots, Roasted Green Beans, or Roasted Brussels Sprouts, would also be great. If you’re in the mood for a starchy side, buttery mashed potatoes or Garlic Toast would complement this creamy casserole perfectly. No matter what you choose, this casserole will be the star of the show!

Recipe

Poppy Seed Chicken Casserole

5 from 2 votes
Print Rate
Serves: 2
Poppy Seed Chicken Casserole with chicken, broccoli, and a crispy golden-brown breadcrumb topping.
Prep: 10 minutes minutes
Cook: 40 minutes minutes
Total: 50 minutes minutes

Ingredients

The Casserole:

  • 2 tbsp butter
  • ¼ cup flour
  • ½ cup milk
  • ½ cup chicken stock
  • 1 cup cheddar cheese
  • ½ cup sour cream
  • 1 teaspoon Dijon mustard
  • ½ tablespoon poppy seed
  • 1 cup broccoli florets
  • 1 large chicken breast

The Topping:

  • 1 tablespoon butter
  • 4 tablespoons panko bread crumbs

Instructions

  • Melt the butter in a saucepan and add the flour. Whisk over a low heat until a thick paste forms. Add milk and chicken stock and whisk until completely smooth. Add the cheese and remove from the heat. Add the sour cream, mustard, and poppy seeds. Set aside.
    Adding poppy seeds to the creamy poppy seed chicken casserole sauce.
  • Bring a large pot of salted water to a boil. Add the broccoli florets and cook for 2 minutes. Remove and let dry completely. Cook the chicken breast in the same water for about 15 minutes. Let cool, then cut into cubes.
  • Combine the broccoli and chicken cubes in a casserole.
    Combining broccoli and chicken cubes in a casserole dish for poppy seed chicken casserole.
  • Pour the cheese sauce over the broccoli-chicken mixture and spread evenly to coat.
    Poppy Seed Chicken Casserole assembled with chicken, broccoli, and creamy sauce.
  • In a saucepan over medium-high, heat add the butter and the bread crumbs. Toast until light brown, then sprinkle over the mixture.
    Poppy seed chicken casserole with broccoli, topped with golden breadcrumbs.
  • Cover the casserole with foil and bake for 20 minutes. Remove from the oven and serve hot.
    Poppy Seed Chicken Casserole with chicken, broccoli, and a crispy golden-brown breadcrumb topping.

Nutrition Info:

Calories: 847kcal (42%) Carbohydrates: 39g (13%) Protein: 48g (96%) Fat: 55g (85%) Saturated Fat: 30g (188%) Sodium: 952mg (41%) Fiber: 3g (13%) Sugar: 8g (9%)

Nutrition Disclaimer

Nutrition information are estimates only and may vary based on the specific brands, ingredients, and portion sizes you use. This data is provided for informational purposes only.

Author: Anna Allee
Course:Dinner
Cuisine:American
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Bright smiling woman with long brown hair at Fushimi Inari Shrine in Japan, traditional torii gates in the background, exploring cultural and travel content for Food Faith Fitness site.

About Anna AlleeDecadent Desserts, International Cuisine

Passionate writer, editor, traveler and foodie, specializing in North American, European, Asian and Australian cuisines.

Reader Interactions

Paola Westbeek

✓Reviewed by Paola WestbeekGastronomy & Fine Wines

Editorially reviewed and recipe-tested in line with our Editorial Policy.

Published: Jul 2, 2025 | Updated: Oct 17, 2025
5 from 2 votes (2 ratings without comment)

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