This Cheesy Kielbasa Potatoes Casserole combines tender potatoes, browned kielbasa, and a creamy cheddar sauce under a golden layer of melted cheese. Onion, garlic, paprika, sour cream, and chicken broth add savory flavor, making this a hearty one-dish meal for a weeknight dinner or a cozy weekend gathering.
Parboiling the potatoes before baking helps them cook evenly without leaving the casserole in the oven for too long. Brown the kielbasa while the potatoes cook, stir everything together with the creamy sauce, and bake until bubbly.
Prep Time: 25 minutes
Cook Time: 40 minutes
Total Time: About 1 hour 5 minutes
Servings: 6–8
Why You’ll Love This Recipe
- Combines smoked kielbasa, potatoes, and melted cheese in one filling casserole
- Uses familiar ingredients that are easy to find
- Browning the sausage adds extra savory flavor
- A creamy sauce brings the potatoes and kielbasa together
- Works as a complete meal or a hearty side dish
- Leftovers reheat easily for another meal
Ingredients
- 2 pounds Yukon Gold or russet potatoes, peeled if desired and cut into 1-inch cubes
- 1 tablespoon olive oil
- 1 pound kielbasa, sliced into ¼-inch rounds
- 1 small yellow onion, finely diced
- 2 cloves garlic, minced
- 3 tablespoons unsalted butter
- 3 tablespoons all-purpose flour
- 1 cup chicken broth
- 1 cup whole milk
- ½ cup sour cream
- 1 teaspoon paprika
- ½ teaspoon garlic powder
- ½ teaspoon black pepper
- 1½ cups shredded cheddar cheese, divided
- ½ cup shredded mozzarella cheese
- Salt, to taste
- 1 tablespoon chopped parsley or green onion, for garnish
How to Make Cheesy Kielbasa Potatoes Casserole
Step 1: Heat the Oven and Prepare the Dish
Preheat the oven to 375°F. Lightly grease a 9-by-13-inch baking dish with butter or cooking spray.
Set a large pot of salted water on the stove to boil. The potatoes will be parboiled before they go into the casserole, which helps them become tender during the shorter baking time.
Step 2: Parboil the Potatoes
Add the cubed potatoes to the boiling water and cook for 8–10 minutes, until they are just beginning to soften around the edges. They should still hold their shape and should not be completely tender.
Drain the potatoes well and set them aside. Letting excess water drain off helps keep the casserole sauce creamy instead of watery.
Step 3: Brown the Kielbasa
While the potatoes cook, heat the olive oil in a large skillet over medium heat. Add the sliced kielbasa in a single layer and cook for about 3–4 minutes per side, until browned.
Transfer the kielbasa to a plate. Leave a small amount of the flavorful drippings in the skillet, then add the diced onion. Cook for 3–4 minutes, stirring occasionally, until softened. Add the garlic and cook for about 30 seconds.
Step 4: Make the Creamy Sauce
Add the butter to the skillet with the onion and garlic. Once melted, sprinkle in the flour and whisk for about 1 minute to make a smooth paste.
Gradually whisk in the chicken broth and milk. Keep stirring as the mixture warms and thickens, about 3–5 minutes. Add the paprika, garlic powder, and black pepper.
Remove the skillet from the heat. Stir in the sour cream and 1 cup of cheddar cheese until the cheese is melted and the sauce is smooth. Taste the sauce and add salt if needed.
Step 5: Combine the Potatoes, Kielbasa, and Sauce
Place the drained potatoes and browned kielbasa in a large bowl. Pour the sauce over them and fold gently until the pieces are evenly coated.
Try not to stir too vigorously, since the potatoes are partly cooked and can break apart. Transfer the mixture to the prepared baking dish and spread it into an even layer.
Step 6: Add the Cheese Topping
Sprinkle the remaining cheddar and mozzarella evenly over the casserole. Cover the dish loosely with foil.
Step 7: Bake Until Hot and Bubbly
Bake covered for 20 minutes. Remove the foil and continue baking for another 10–15 minutes, until the potatoes are tender, the sauce bubbles around the edges, and the cheese is melted and lightly golden.
To check the potatoes, pierce a few pieces in the center with a fork. They should be tender without falling apart.
Step 8: Rest and Garnish
Let the casserole rest for 5–10 minutes before serving. This gives the sauce time to settle and makes it easier to portion.
Sprinkle with chopped parsley or green onion if desired. Serve hot as a main dish or alongside a crisp salad or steamed vegetables.
Tips for the Best Cheesy Kielbasa Potatoes Casserole
- Cut the potatoes evenly. Similar-size pieces cook at the same rate.
- Parboil until just starting to soften. Fully cooked potatoes may crumble when mixed with the sauce.
- Drain the potatoes well. Extra water can thin the sauce.
- Brown the kielbasa first. The browned edges add smoky, savory flavor to the casserole.
- Whisk the sauce gradually. Add the broth and milk a little at a time to help prevent lumps.
- Take the sauce off the heat before adding sour cream. This helps keep it smooth.
- Grate cheese fresh if possible. It usually melts more smoothly than pre-shredded cheese.
- Taste before adding salt. Kielbasa, broth, and cheese can all be salty.
- Let the casserole rest before serving. The sauce thickens slightly as it cools.
Easy Variations
Add More Vegetables
Stir in steamed broccoli, peas, or sautéed bell pepper before baking. If using vegetables with high water content, cook and drain them first so the sauce stays thick.
Use a Different Sausage
Smoked sausage or turkey kielbasa can replace the pork kielbasa. For a spicier casserole, use andouille sausage or add a pinch of red pepper flakes.
Change the Cheese
Replace some of the cheddar with Monterey Jack, Colby, or pepper jack. Use a cheese that melts well and complements the smoky sausage.
Make It Spicier
Add crushed red pepper flakes, cayenne, or diced jalapeño to the sauce. Start with a small amount and adjust to taste.
Use Unpeeled Potatoes
Yukon Gold potatoes have thin skins that can be left on. Scrub them well before cutting, and add a few minutes to the parboiling time if the pieces are especially large.
Add a Crunchy Topping
Sprinkle buttered breadcrumbs or crushed buttery crackers over the cheese during the last 10 minutes of baking for a crisp topping.
Make-Ahead and Storage
To prepare the casserole ahead, parboil the potatoes, brown the kielbasa, and make the sauce. Combine everything in the baking dish, cover, and refrigerate for up to 24 hours. Add the cheese topping just before baking.
Because the casserole will be cold from the refrigerator, let it sit at room temperature for about 20 minutes while the oven heats. Add approximately 10–15 minutes to the covered baking time, checking that the center is hot and the potatoes are tender.
Store leftovers in an airtight container in the refrigerator for up to 3–4 days. Reheat portions in the microwave, or cover a larger portion with foil and warm it in a 350°F oven until heated through. Add a splash of milk or broth if the sauce has thickened.
Freeze the casserole after baking and cooling for up to 2 months. Thaw it in the refrigerator before reheating. The potatoes may soften slightly after freezing.
Frequently Asked Questions
Do I have to peel the potatoes?
No. Yukon Gold potatoes have thin skins that work well unpeeled. Russet skins can also be left on if scrubbed thoroughly, though peeling them gives the casserole a softer texture.
Can I skip parboiling the potatoes?
Parboiling is recommended for this version because it helps the potato cubes become tender during the casserole’s baking time. If you use raw potatoes, cut them small, cover the casserole tightly, and expect a longer baking time—about 60–75 minutes, depending on the potato size.
How do I keep the sauce from becoming lumpy?
Whisk the flour into the melted butter first, then add the broth and milk gradually while stirring. Keep the heat moderate and whisk continuously as the sauce thickens.
Why did my casserole turn watery?
The potatoes may not have drained fully, or the sour cream may have been added while the sauce was boiling. Drain the potatoes well and stir in the sour cream after removing the pan from the heat.
Can I use reduced-fat sour cream?
Yes, though the sauce may be a little less rich. Stir it in off the heat and avoid boiling the sauce afterward.
What should I serve with this casserole?
It’s filling enough to serve on its own. A green salad, green beans, roasted broccoli, or a light vegetable side pairs well with the rich cheese and sausage.
How do I know the casserole is done?
The potatoes should be fork-tender, the sauce should bubble around the edges, and the center should be hot. If checking with a food thermometer, the center should reach 165°F.
Can I make this in a smaller baking dish?
Yes, but use a dish large enough to hold the ingredients without filling it to the top. If the casserole is deeper, it may need additional covered baking time.
Final Thoughts
This Cheesy Kielbasa Potatoes Casserole is a cozy, filling dish with tender potatoes, browned sausage, and a creamy cheese sauce. Prepare it for a family dinner, make it ahead for an easy meal, or serve it as a hearty side at a gathering. Let it rest briefly after baking, then bring it to the table while the cheese is still warm and bubbly.
