Crockpot Pierogi Casserole With Kielbasa

Featured in: Simple One-Pot Comfort Suppers

This hearty slow cooker dish combines frozen potato and cheese pierogi with sliced smoky kielbasa, creating layers of Eastern European-inspired comfort food. The creamy sauce blends condensed mushroom soup with sour cream, milk, and seasonings, poured over the layered ingredients. After 4 hours on low heat, the pierogi become tender while the kielbasa infuses everything with savory flavor. Topped with melted cheddar and fresh herbs, this one-dish meal serves six and requires just 15 minutes of active preparation time.

Updated on Wed, 28 Jan 2026 12:00:00 GMT
Golden brown, bubbly cheese tops this Crockpot Pierogi Casserole With Kielbasa, ready to be scooped from the slow cooker. Save
Golden brown, bubbly cheese tops this Crockpot Pierogi Casserole With Kielbasa, ready to be scooped from the slow cooker. | basilpeak.com

Rain was pounding against the window and the thought of standing over a stove for an hour felt impossible. I found two boxes of frozen pierogi in the back of the freezer and decided to see if the slow cooker could handle them. The result was a creamy smoky mess that smelled better than anything I had planned to cook. It felt like a lucky accident that soon became a staple for busy nights. Now this recipe is my go to when the weather turns chilly and motivation is low.

The neighbor popped in while this was simmering and asked if I was making a traditional Polish feast from scratch. I laughed because the slow cooker was doing all the hard work while I sat on the couch with a book. The way the cheese melts into the edges of the pierogi is honestly the best part of the whole experience. It reminds me of the church potlucks I used to attend where the heaviest dishes were always the first to vanish.

Ingredients

  • Two 16 ounce packages frozen potato and cheese pierogi: These are the backbone of the dish and they hold up well during the simmer.
  • One pound kielbasa sliced into half inch rounds: Choose a brand with a good snap because the smoky flavor permeates the sauce.
  • One medium yellow onion thinly sliced: Slicing these thinly allows them to soften into sweet ribbons that blend perfectly with the cream.
  • Two cups shredded cheddar cheese: Sharp cheddar provides a necessary bite to balance out the richness of the dairy.
  • One 10.5 ounce can condensed cream of mushroom soup: This acts as the thickener and adds an earthy depth to the meat and potatoes.
  • One cup sour cream: It adds a classic tangy finish that any good pierogi dish requires.
  • Half cup milk: A little splash helps thin the soup just enough to coat every single pierogi evenly.
  • Garlic powder and black pepper: These simple seasonings are all you need to enhance the savory notes of the sausage.
  • Two tablespoons chopped fresh chives: Adding these at the end provides a bright pop of color and freshness.

Instructions

Product image
Bake lasagna, casseroles, and roasted dishes evenly, then serve straight from oven to table.
Check price on Amazon
Prep the pot:
Generously grease your slow cooker insert to ensure the cheese does not create a permanent bond with the ceramic.
Layer the base:
Arrange half of your frozen pierogi in an even layer followed by a shower of kielbasa and onions.
Add the cheese:
Sprinkle half of your cheddar over the first layer to create a gooey middle section.
Repeat the process:
Stack the remaining pierogi and sausage on top before adding the rest of the golden cheese.
Whisk the sauce:
Combine the soup and sour cream with the milk and spices until the mixture is completely smooth.
Final pour:
Drizzle the creamy sauce over the layers making sure it seeps down into all the little crevices.
Set and forget:
Close the lid and let the low heat work its magic for four hours until the edges are bubbly.
Garnish and serve:
Toss on some fresh chives at the very end to add a hit of color before portioning it out.
Product image
Bake lasagna, casseroles, and roasted dishes evenly, then serve straight from oven to table.
Check price on Amazon
Thick slices of smoky kielbasa and creamy pierogi swim in a rich, cheesy sauce in this hearty casserole. Save
Thick slices of smoky kielbasa and creamy pierogi swim in a rich, cheesy sauce in this hearty casserole. | basilpeak.com

I once forgot to grease the pot and spent forty minutes scrubbing cheese off the sides which taught me a valuable lesson. Even with the extra cleanup the family still talked about that dinner for an entire week.

Choosing Your Sausage

Choosing the meat is where you can really customize the flavor profile of the casserole. A traditional smoked Polish sausage gives the most authentic taste but a spicy variety adds a modern kick. I have even tried this with a turkey sausage for a lighter version that still packs a punch. Just make sure the slices are thick enough to keep their texture after hours of cooking.

The Toasted Onion Secret

While the recipe calls for raw onions the flavor profile shifts significantly if you take five minutes to brown them first. Sautéing them in a little butter brings out a caramelized sweetness that contrasts beautifully with the sharp cheese. If you are in a rush though the slow cooker will still soften them into a lovely mild component. It really comes down to how much time you want to spend at the stove before walking away.

Making It a Full Meal

This casserole is quite heavy so I usually pair it with something bright and acidic to cut through the richness. A simple vinegar based coleslaw or a heap of steamed green beans works wonders on the side. It helps balance the plate and makes the whole meal feel a bit more rounded.

  • Try a crisp apple salad for a sweet crunch.
  • A side of roasted Brussels sprouts adds a nice charred flavor.
  • Do not forget a dollop of extra sour cream on the side for dipping.
Product image
Slow cook soups, stews, roasts, and casseroles effortlessly for comforting meals with rich, developed flavors.
Check price on Amazon
Served in a rustic bowl with fresh chives, this comforting Crockpot Pierogi Casserole With Kielbasa looks incredibly delicious. Save
Served in a rustic bowl with fresh chives, this comforting Crockpot Pierogi Casserole With Kielbasa looks incredibly delicious. | basilpeak.com

This dish is proof that sometimes the simplest ingredients create the most lasting memories around the dinner table. I hope your family loves this cozy shortcut to a classic comfort meal as much as mine does.

Questions & Answers

Can I use fresh pierogi instead of frozen?

Yes, fresh pierogi work well but may require slightly less cooking time. Check for doneness after 3 hours on low to prevent them from becoming too soft.

What other meats can I substitute for kielbasa?

Polish sausage, smoked sausage, or even cooked bacon work great. For lighter options, try turkey kielbasa or chicken sausage with similar cooking results.

Can I assemble this ahead of time?

Absolutely! Assemble all layers in the slow cooker insert the night before, refrigerate, then start cooking when ready. Add 30-60 minutes to cooking time if starting from cold.

How do I prevent the pierogi from getting mushy?

Don't overcook—4 hours on low is ideal. Avoid opening the lid frequently, which releases heat and extends cooking time, potentially making pierogi too soft.

Can I freeze leftovers?

Yes, leftovers freeze well for up to 3 months. Portion into airtight containers and thaw overnight in the refrigerator before reheating gently in the microwave or oven.

What sides pair well with this dish?

A crisp green salad with vinaigrette cuts through the richness. Steamed vegetables like broccoli or green beans also complement the hearty flavors nicely.

Crockpot Pierogi Casserole With Kielbasa

Comforting pierogi and kielbasa baked in slow cooker with creamy cheesy sauce

Time to Prep
15 min
Time to Cook
240 min
Overall Time
255 min
Recipe by Hailey Evans


Skill Level Easy

Cuisine American, Eastern European-inspired

Portions 6 Number of Servings

Diet Preferences None specified

What You'll Need

Main Ingredients

01 2 packages (16 oz each) frozen potato and cheese pierogi
02 1 lb kielbasa, sliced into ½-inch rounds
03 1 medium yellow onion, thinly sliced
04 2 cups shredded cheddar cheese

Sauce

01 1 can (10.5 oz) condensed cream of mushroom soup
02 1 cup sour cream
03 ½ cup milk
04 ½ teaspoon garlic powder
05 ¼ teaspoon black pepper

Topping

01 2 tablespoons chopped fresh chives or parsley

Steps

Step 01

Prepare the slow cooker: Lightly grease the interior of a 6-quart slow cooker to prevent sticking.

Step 02

Layer first base: Arrange half of the frozen pierogi on the bottom of the slow cooker.

Step 03

Add first protein and vegetables: Top with half of the sliced kielbasa and half of the sliced onions.

Step 04

Add first cheese layer: Sprinkle 1 cup of shredded cheddar cheese over the vegetables and kielbasa.

Step 05

Layer second base: Repeat with remaining pierogi, kielbasa, onions, and the remaining cup of cheddar cheese.

Step 06

Prepare the sauce: In a medium mixing bowl, whisk together cream of mushroom soup, sour cream, milk, garlic powder, and black pepper until completely smooth.

Step 07

Add sauce: Pour the sauce evenly over all layered ingredients in the slow cooker.

Step 08

Cook: Cover and cook on low setting for 4 hours, or until the casserole is heated through and the sauce is bubbly around the edges.

Step 09

Finish and serve: Garnish with chopped fresh chives or parsley immediately before serving.

Tools Needed

  • 6-quart slow cooker
  • Cutting board and knife
  • Mixing bowl and whisk
  • Measuring cups and spoons

Allergy Advice

Look into all items for allergy risks and talk with a healthcare provider with any concerns.
  • Contains milk
  • Contains wheat gluten
  • May contain soy from soup base
  • Possibly contains egg in pierogi
  • Contains pork from kielbasa

Nutritional Details (by portion)

Details here are informative and do not replace personalized medical guidance.
  • Caloric Value: 530
  • Fats: 32 g
  • Carbohydrates: 39 g
  • Proteins: 21 g