
This classic Kielbasa and Pierogi Bake transforms store-bought pierogies into a hearty, satisfying casserole that's perfect for busy weeknights. The smoky kielbasa and caramelized onions complement the creamy potato pierogies, while a rich cheese sauce brings everything together for a comforting dish that will please the whole family.
I first made this dish when my Polish mother-in-law was visiting, and she declared it reminded her of home but with an American twist. Now it's our go-to meal whenever we crave something hearty but don't have hours to spend in the kitchen.
Ingredients
- Frozen potato and cheese pierogies: foundation of the dish and saves tremendous prep time
- Yellow onion: caramelizes beautifully and provides sweetness to balance the smoky sausage
- Kielbasa sausage: authentic Polish smoked sausage that adds protein and deep flavor
- Sour cream and cream cheese: create the rich, tangy base for the sauce
- Whole milk: thins the sauce to the perfect consistency
- Garlic powder: adds savory notes without overpowering the dish
- Paprika: brings color and subtle smokiness
- Cheddar cheese: forms a golden brown crust on top
- Fresh parsley: brightens the dish with color and freshness
Step-by-Step Instructions
- Prepare The Baking Dish:
- Preheat your oven to 375°F and lightly grease a 9×13 inch baking dish. The light coating of oil prevents sticking and makes cleanup easier.
- Caramelize The Onions:
- Heat olive oil in a large skillet over medium heat until shimmering. Add thinly sliced onions and cook slowly for 5 to 7 minutes. Stir occasionally and watch for them to turn soft and golden brown. This process releases natural sugars in the onions and creates amazing flavor depth.
- Brown The Kielbasa:
- Add sliced kielbasa to the onions and continue cooking for 4 to 5 minutes. The sausage will release its savory oils and develop crisp edges. This step is crucial as it develops the smoky flavor that permeates the entire dish.
- Create The Cream Sauce:
- In a large bowl whisk together sour cream cream cheese milk garlic powder black pepper and paprika until smooth. Make sure your cream cheese is properly softened to avoid lumps. The sauce should be pourable but thick enough to coat the back of a spoon.
- Assemble The Casserole:
- Arrange frozen pierogies in the prepared baking dish. Pour the cream sauce over them and gently toss to ensure each pierogi is coated. Distribute the sautéed onions and kielbasa on top and mix slightly.
- Add Cheese And Bake:
- Sprinkle shredded cheddar evenly over everything. Cover with foil and bake for 20 minutes. The foil traps steam to cook the pierogies. Then remove the foil and continue baking for 10 to 15 minutes until cheese is bubbly and golden.

My family has a special connection to this dish. My grandfather emigrated from Poland and always said good kielbasa was the secret to happiness. When I make this bake, I always splurge on authentic Polish kielbasa from our local European deli. The difference in flavor is remarkable and honors my heritage.
Make-Ahead Options
This pierogi bake shines as a make-ahead meal. You can assemble everything up to the baking step, cover with plastic wrap, and refrigerate for up to 24 hours. When ready to cook, remove from the refrigerator 30 minutes before baking, then follow the baking instructions adding an extra 5 minutes of covered baking time. The flavors actually improve as they meld together overnight.
Ingredient Substitutions
This recipe welcomes adaptations based on what you have available. Any variety of pierogies works beautifully. Try mushroom and sauerkraut pierogies for a traditional Polish flavor profile. Smoked turkey sausage can replace kielbasa for a lighter option. Greek yogurt makes a tangy substitute for sour cream. For a vegetarian version, omit the kielbasa and add 2 cups of sautéed mushrooms instead.
Serving Suggestions
This hearty bake pairs perfectly with a simple side salad dressed with vinaigrette to cut through the richness. For an authentic Polish meal, serve with a side of sauerkraut or cucumber salad. A dollop of extra sour cream on top adds creamy contrast to each serving. For special occasions, accompany with a cold Polish beer or a glass of chilled apple cider for non-alcoholic options.
Cultural Context
This dish represents Polish-American fusion cooking at its finest. Traditional pierogies, dumplings filled with potato and cheese, date back centuries in Polish cuisine. They were typically served boiled with caramelized onions and sour cream. This casserole adaptation makes the dish more accessible for American home cooks while preserving the essential flavors. The addition of a cheese sauce reflects American casserole traditions, creating a perfect marriage of culinary heritage.
Recipe FAQs
- → Can I use fresh pierogies instead of frozen?
Yes, fresh pierogies can be substituted for frozen. The advantage is they typically have a more tender texture. If using fresh, you may need to reduce the initial covered baking time by about 5 minutes since they won't need as much time to cook through as frozen ones.
- → What can I substitute for kielbasa?
If kielbasa isn't available, you can substitute other smoked sausages like Polish sausage, smoked bratwurst, or even chorizo for a spicier version. For a lighter option, you could use turkey or chicken sausage with smoky flavoring.
- → How do I make this dish ahead of time?
To make ahead, prepare everything up to the point of baking. Cover tightly and refrigerate for up to 24 hours. When ready to bake, add about 10 minutes to the covered baking time since you'll be starting with a cold dish. The texture of the pierogies may be slightly softer than when made fresh.
- → Can I freeze this casserole?
Yes, you can freeze this casserole either before or after baking. If freezing before baking, assemble completely (except for the final cheese topping), cover tightly, and freeze for up to 2 months. Thaw overnight in refrigerator, add cheese, and bake as directed with a few extra minutes. If freezing leftovers, portion into airtight containers and freeze for up to 3 months.
- → What sides go well with this dish?
This hearty dish pairs wonderfully with lighter sides like a simple green salad with vinaigrette, roasted vegetables (especially Brussels sprouts or asparagus), braised red cabbage, or a cucumber salad. For a truly authentic Polish meal, consider serving with pickled beets or a side of sauerkraut.
- → Can I make this dish less rich?
To create a lighter version, you can use light cream cheese and reduced-fat sour cream. You could also replace the whole milk with 2% or skim milk. Another option is to reduce the cheese topping by half or use a part-skim variety. These modifications will reduce the overall fat content while still maintaining good flavor.