Slow Cooker 5-Ingredient Kielbasa and Sauerkraut

There are some dinners that feel almost too easy—and this Slow Cooker Kielbasa and Sauerkraut is one of them. With just five simple ingredients and about five minutes of prep, you can have a hearty, tangy, smoky meal that tastes like it simmered on the stove all afternoon. It’s the kind of no-fuss dinner that’s perfect for busy weeknights, game-day crowds, or when you just need something warm and comforting.

The beauty of this dish is how the flavors meld and deepen over a long, slow cook. The smoky sausage, tender sauerkraut, and sweet onions create a beautifully balanced bite—tangy, savory, and a little sweet. The slow cooker does all the work, and your kitchen fills with the most inviting aroma. It’s one of those meals that quietly earns a permanent spot in your recipe rotation.

Ingredients

1 to 2 packages kielbasa sausage, sliced into 1-inch chunks (about 1.5 to 2 pounds total)
2 pounds sauerkraut (bagged or jarred, not canned)
1 medium yellow onion, thinly sliced
2 tablespoons honey or brown sugar (optional, but recommended to balance the tang)
1 tablespoon unsalted butter(optional, for richness)

Directions

Prep the slow cooker: Lightly butter the insert of a 4- to 6-quart slow cooker or spray it with nonstick cooking spray.
Layer the ingredients: Place the sliced kielbasa in the bottom of the slow cooker. Layer the sliced onion over the sausage. Sprinkle with the brown sugar or drizzle with honey, if using.
Add the sauerkraut: Pour the sauerkraut (with its juices) over the top. If you prefer a milder, less tangy flavor, you can drain and rinse the sauerkraut before adding it. Dot the top with the butter, if using.
Cook: Cover and cook on LOW for 5 to 8 hours or on HIGH for 3 to 4 hours, until the sausage is heated through and the flavors have melded.
Serve: Stir everything together and serve hot.

Variations & Expert Tips

Balance the tang: If your sauerkraut tastes too sour, you can stir in the brown sugar or honey about an hour before serving and let it cook a little longer to blend.
Rinse for milder flavor: If you want a less assertive tang, drain the sauerkraut in a colander and rinse it with cold water before adding it to the slow cooker.
Add some crunch: For extra texture and a classic pairing, add 6 medium red potatoes (cut in half) to the bottom of the slow cooker before layering the other ingredients.
Swap the protein: You can use turkey kielbasa, smoked sausage, or even bratwurst in place of traditional pork kielbasa.
Try a different liquid: If you’re not using butter or sugar, you can add a splash of chicken broth, beer, or apple juice to the pot for extra moisture and flavor.

Storage and Reheating

Store leftovers in an airtight container in the refrigerator for up to 4–5 days. Reheat gently on the stovetop or in the microwave. This dish also freezes well for up to 3 months.

Frequently Asked Questions

Do I need to rinse the sauerkraut?
Not necessarily. If you prefer a milder flavor, you can drain and rinse it. If you love that tangy, fermented bite, just use it straight from the bag with its juices.

Can I add potatoes?
Yes! Add quartered potatoes to the bottom of the slow cooker before layering the other ingredients. They’ll cook right along with everything else.

What should I serve with this?
It’s great on its own, but you can serve it with mashed potatoes, buttered egg noodles, crusty bread, or a simple green salad.

What to Serve With This Dish

Mashed potatoes, egg noodles, or roasted potatoes.
Crusty rye bread with butter.
A crisp green salad with a tangy vinaigrette.
Make “Fake Out” Reubens by piling the sausage and sauerkraut onto toasted rye bread with Swiss cheese and spicy mustard.

Final Thoughts

This Slow Cooker Kielbasa and Sauerkraut is the definition of a set-it-and-forget-it meal. It’s tangy, smoky, and deeply satisfying—the kind of dinner that makes a busy day feel a little easier. I hope it becomes a favorite in your kitchen as it has in mine.