Baked Pierogi and Kielbasa Casserole

Baked Pierogi and Kielbasa Casserole is the kind of dinner that makes a busy evening feel a little easier. Frozen pierogies and sliced kielbasa are baked together with onions, a creamy sauce, and plenty of melted cheese until everything is hot, golden, and comforting.

The pierogies stay soft and tender while the edges pick up just enough color from the oven. Kielbasa brings a smoky, savory bite, and the creamy sauce ties the potatoes, cheese, and sausage together without making the casserole overly heavy.

It’s a particularly handy recipe for those nights when you want something filling but don’t want to spend much time at the stove. Serve it for a weeknight dinner, a casual Sunday meal, or whenever you have a few hungry people around the table.

Why It Works

There’s very little prep involved here, but the finished casserole tastes like you put in considerably more effort. The onions add sweetness as they bake, while the kielbasa gets lightly browned around the edges.

Using frozen pierogies also means there’s no need to boil them first. They can go straight into the baking dish, which keeps this recipe pleasantly simple and saves you an extra pot to wash.

The key is giving everything enough sauce before it goes into the oven. That keeps the pierogies tender rather than dry as they heat through.

Ingredients You’ll Need

Frozen Pierogies

Use your favorite frozen potato-and-cheese pierogies. There’s no need to thaw or boil them first. Keeping them frozen makes assembly especially quick.

Kielbasa

Smoked kielbasa gives the casserole its savory, smoky flavor. Slice it into fairly thin rounds so you get a little sausage in nearly every serving.

Onion

A yellow onion works well here. Sautéing it briefly before assembling the casserole softens it and brings out its natural sweetness.

Creamy Sauce

A simple combination of sour cream, cream of chicken soup, and milk creates a sauce that’s rich enough to coat the pierogies while still being easy to spread.

Cheese

Sharp cheddar adds plenty of flavor and melts beautifully over the top. You can substitute mild cheddar if you prefer a gentler flavor.

How To Make Baked Pierogi And Kielbasa Casserole

1. Prepare The Oven And Onion

Heat the oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish.

Heat a skillet over medium heat with a little butter or oil. Add the sliced onion and cook for about 4–5 minutes, stirring occasionally, until softened and lightly golden.

2. Mix The Creamy Sauce

In a bowl, stir together 1 can (10.5 ounces) cream of chicken soup, 1 cup sour cream, ½ cup milk, ½ teaspoon garlic powder, ½ teaspoon salt, and ¼ teaspoon black pepper.

The mixture should be smooth and pourable. If it seems unusually thick, add another tablespoon or two of milk.

3. Assemble The Casserole

Arrange 1 package (16 ounces) frozen pierogies in the prepared baking dish. Scatter 14 ounces sliced kielbasa and the softened onion over the top.

Pour the creamy sauce evenly over everything, then gently toss or spread it around with a spatula so the pierogies are coated.

Sprinkle 1½ cups shredded cheddar cheese evenly over the casserole.

4. Bake Until Bubbly

Cover the dish tightly with foil and bake for 30 minutes. Remove the foil and continue baking for another 15–20 minutes, until the sauce is bubbling and the cheese is melted with lightly browned edges.

Let the casserole rest for about 5 minutes before serving. The sauce will thicken slightly as it stands.

FAQs

Can I Use Fresh Pierogies?

Yes. Fresh pierogies can be used, although they may cook a little faster. Start checking the casserole around the 35–40 minute mark.

Do I Need To Thaw Frozen Pierogies?

No. Add them directly from the freezer. That’s one of the reasons this casserole is so convenient.

Can I Use A Different Sausage?

Absolutely. Smoked sausage, turkey kielbasa, or another fully cooked smoked sausage can work well. Just slice it into bite-sized pieces.

Why Are My Pierogies Dry?

Usually, the issue is not enough sauce or leaving the casserole uncovered for the entire baking time. Covering it for the first 30 minutes helps the pierogies heat through without drying out.

Can I Make It Ahead?

You can assemble the casserole several hours ahead and refrigerate it, covered. Because it will be starting cold, allow extra baking time and make sure the center is hot before serving.

Can I Add Vegetables?

Definitely. Sautéed mushrooms, spinach, bell peppers, or broccoli are easy additions. Avoid adding large amounts of watery vegetables, which can thin the sauce.

Recipe Variations

Bacon And Cheddar

Cook a few slices of bacon until crisp, crumble them, and scatter them over the casserole before serving.

Mushroom Kielbasa

Sauté sliced mushrooms along with the onion for an earthy addition that pairs especially well with the smoked sausage.

Spicy Version

Use a spicy kielbasa and add a pinch of crushed red pepper flakes to the sauce.

Sauerkraut Style

Add a layer of well-drained sauerkraut before baking for a tangy combination that works naturally with kielbasa and pierogies.

Extra Cheesy

Stir a little shredded mozzarella or Monterey Jack into the cheddar topping for an especially gooey finish.

Storage

Refrigerate leftovers in an airtight container for up to 3–4 days. Reheat individual portions in the microwave until steaming hot, or cover the casserole with foil and warm it in a 350°F oven until heated through. If the casserole seems dry after refrigeration, add a small splash of milk before reheating.

What To Serve With Baked Pierogi And Kielbasa Casserole

Because the casserole is already rich and filling, I like serving it with something crisp and fresh alongside it. A simple green salad with a tangy vinaigrette works nicely, as do roasted green beans, steamed broccoli, or lightly dressed cabbage. For the table, put out some extra sour cream, sliced green onions, and fresh parsley so everyone can add a little something to their plate.

Don’t skip the short resting time after baking. It gives the creamy sauce a chance to settle and makes the casserole easier to scoop without everything running together.

If you’re preparing it ahead, keep it covered in the refrigerator and take it out while the oven preheats. That small step helps it bake more evenly.

This Baked Pierogi and Kielbasa Casserole is the ultimate easy comfort food, combining tender pierogies, savory kielbasa, creamy sauce, and plenty of melted cheese in one hearty dish. It’s simple to assemble, satisfying, and perfect for a cozy weeknight dinner or family meal.

Prep Time: 15 minutes

Cook Time: 40 minutes

Total Time: 55 minutes

Servings: 6

Ingredients

• 1 16-ounce package frozen pierogi, thawed
• 12 ounces kielbasa, sliced into ¼-inch rounds
• 1 small yellow onion, thinly sliced
• 2 tablespoons butter
• 1 cup sour cream
• ½ cup chicken broth
• 1 cup shredded cheddar cheese
• ½ teaspoon garlic powder
• ½ teaspoon smoked paprika
• ½ teaspoon salt
• ¼ teaspoon black pepper
• 2 tablespoons chopped fresh parsley, for garnish

Instructions

1. Preheat the oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish.
2. Cook the kielbasa and onion. Melt the butter in a large skillet over medium heat. Add the sliced kielbasa and onion and cook for 5–7 minutes, stirring occasionally, until the kielbasa is lightly browned and the onion has softened.
3. Make the sauce. In a bowl, whisk together the sour cream, chicken broth, garlic powder, smoked paprika, salt, and black pepper until smooth.
4. Assemble the casserole. Arrange the thawed pierogi in the prepared baking dish. Scatter the browned kielbasa and onions evenly over the top, then pour the sour cream mixture over everything.
5. Add the cheese. Sprinkle the shredded cheddar evenly over the casserole.
6. Bake. Cover the dish loosely with foil and bake for 20 minutes. Remove the foil and continue baking for another 15–20 minutes, until the cheese is melted and bubbly and the edges are lightly golden.
7. Serve. Let the casserole rest for about 5 minutes before serving. Sprinkle with fresh parsley and serve warm.