
This crockpot cheesy chicken casserole brings together tender potatoes, juicy chicken, and savory kielbasa in a rich, creamy sauce that melts together during slow cooking. The combination creates a comforting meal that's perfect for busy weeknights or weekend family dinners.
I first made this casserole when my in-laws unexpectedly announced they were stopping by for dinner. It was a snowy evening, and this dish filled the house with amazing aromas while I focused on tidying up. Now it's our go-to whenever we're hosting casual gatherings.
Ingredients
- Red potatoes: These hold their shape better than russet potatoes during long cooking, choose firm ones without sprouting
- Chicken breast: Adds lean protein, look for even-sized pieces for consistent cooking
- Kielbasa: Provides smoky depth and savory flavor, select a quality brand with visible spices
- White onion: Creates aromatic foundation, choose firm onions without soft spots
- Cheddar cheese: Forms the creamy base and golden top, freshly shredded melts better than pre-packaged
- Cream of chicken and herbs: Ties all flavors together, the herbed version adds complexity
- Sour cream: Adds tanginess that balances the rich flavors
- Heavy cream: Creates the luxurious sauce texture, full-fat works best
- Italian seasoning: Provides herbal notes, a fresh blend offers more flavor
- Garlic powder: Adds depth without overwhelming, look for brands without anti-caking agents
- Salt and Pepper: Enhances all other flavors, freshly ground pepper makes a difference
How To Make Crockpot Cheesy Chicken Casserole
- Prepare the base:
- Combine your diced potatoes, chicken cubes, sliced kielbasa, diced onions, and 2 cups of the shredded cheddar in your lightly greased crockpot. Ensure the potato pieces are uniform size for even cooking. This mixture creates the hearty foundation of your casserole.
- Create the sauce:
- In a separate bowl, whisk together the cream of chicken and herbs, sour cream, heavy cream, Italian seasoning, garlic powder, salt, and pepper until completely smooth. This creamy mixture will envelop all the solid ingredients during cooking, infusing them with flavor.
- Combine everything:
- Pour your prepared sauce over the potato mixture and gently stir to ensure even coating. Make sure to reach the bottom corners of the crockpot to prevent any dry spots. The sauce should touch every ingredient for maximum flavor development.
- Add the cheese topping:
- Sprinkle the remaining half cup of cheddar cheese evenly across the top of the mixture. This will create a beautiful golden, slightly crispy top layer as it cooks. Resist the urge to stir after adding this top layer.
- Slow cook to perfection:
- Set your crockpot to low and cook for 6-8 hours or on high for 5 hours. The casserole is done when the potatoes are fork tender and the chicken is completely cooked through. Watch carefully toward the end to prevent the potatoes from becoming mushy.

The kielbasa is truly the secret star of this recipe. When my grandmother first tasted this dish, she immediately asked for the recipe, saying it reminded her of the comforting meals her Polish mother used to make. Now whenever I slice kielbasa for this casserole, I think of those generations of family cooking traditions being passed down.
Storage and Reheating
This casserole keeps beautifully in the refrigerator for up to 4 days in an airtight container. The flavors actually improve overnight as everything melds together. For reheating, portion out what you need and warm in the microwave for 2-3 minutes, stirring halfway through. For a crisper top, reheat in the oven at 350°F for about 20 minutes until hot throughout. The casserole also freezes well for up to 3 months. Just thaw overnight in the refrigerator before reheating.

Ingredient Substitutions
This recipe welcomes adaptations based on what you have available. Turkey breast works wonderfully in place of chicken, while any smoked sausage can substitute for kielbasa. Gold potatoes offer a creamier texture if red aren't available. For a lighter version, use reduced-fat cream cheese instead of some of the heavy cream. Vegetable lovers can add frozen peas, corn, or bell peppers during the last hour of cooking. Those avoiding condensed soups can make a simple roux with butter, flour, and chicken broth as a replacement.
Serving Suggestions
This hearty casserole pairs beautifully with a simple side salad dressed with vinaigrette to cut through the richness. Crusty bread or dinner rolls are perfect for sopping up the creamy sauce. For a complete meal with more vegetables, serve alongside steamed broccoli or roasted Brussels sprouts. During summer months, a side of fresh sliced tomatoes with basil makes a refreshing contrast. For special occasions, consider starting with a light soup, like a clear chicken broth with herbs.
Frequently Asked Questions
- → Can I use other types of potatoes?
Yes, you can use Yukon Gold or russet potatoes instead of red potatoes. Just ensure you dice them evenly for consistent cooking.
- → What can I substitute for kielbasa?
You can use smoked sausage, chorizo, or chicken sausage as a substitute for kielbasa. They will still provide a savory flavor.
- → Can I make this dish dairy-free?
To make this dish dairy-free, replace the cheddar cheese with a dairy-free alternative, and substitute sour cream and heavy cream with coconut cream or cashew cream.
- → How can I prevent overcooking the potatoes?
To avoid overcooking, ensure the potatoes are diced uniformly and check the dish occasionally toward the end of the cooking time.
- → Can I prepare this ahead of time?
Yes, you can prepare the ingredients a day in advance, store them in the refrigerator, and combine them in the crockpot just before cooking.