Name: Pierogi Casserole Recipe
Prep time: 5 min
Cook time: 40 min
Total time: 45 min
Ingredients: 2 pounds frozen cheddar pierogies, ((do not thaw)); 1 (16-ounce) jar alfredo sauce; 14 ounces smoked kielbasa sausage, (sliced); 1 cup mozzarella, (shredded); 1 cup cheddar, (shredded); 1/4 cup green onions, (sliced)

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This easy Pierogi Casserole Recipe is one of my favorite weeknight comfort food dinners. Frozen cheddar pierogi, smoky kielbasa, creamy Alfredo sauce, and plenty of melted cheese come together in just 5 minutes of prep for a hearty family meal everyone loves.

If your family loves hearty comfort food, be sure to try my Hamburger Potato Casserole, Baked Mostaccioli, and Cowboy Casserole. You can also browse all of my Ground Beef Recipes for even more cozy family dinners.

✨ Before You Begin

✨ Use frozen pierogies: Keep them frozen until you’re ready to assemble the casserole. They bake up perfectly without any extra prep.

✨ Brown the kielbasa (optional): If you have a few extra minutes, brown the kielbasa in a skillet before layering it into the casserole. It adds even more smoky, savory flavor.

✨ Choose a quality Alfredo sauce: Since it flavors the entire casserole, use a sauce you enjoy. Alfredo made with real cream, butter, and Parmesan will give you the richest results.

✨ Freshly shred the cheese: Freshly shredded mozzarella and cheddar melt more smoothly than pre-shredded cheese and create a creamier topping.

✨ Spray the foil: Coat one side of the foil with nonstick spray before covering the casserole to keep the melted cheese from sticking.

Pierogi Casserole Ingredients + Key Notes

Frozen Cheddar Pierogies: This recipe starts with frozen cheddar pierogies, and there’s no need to thaw or boil them first. They bake up perfectly tender while soaking up the creamy Alfredo sauce.

Alfredo Sauce: A jar of your favorite Alfredo sauce keeps this casserole quick and easy. Choose one made with real cream and Parmesan for the richest flavor.

Smoked Kielbasa: Smoked kielbasa adds savory, smoky flavor that pairs perfectly with the cheesy pierogies. Slice it into bite-sized rounds so you get a little in every bite.

Mozzarella Cheese: Mozzarella melts into that gooey, cheesy layer everyone loves. Freshly shredded cheese will give you the smoothest melt.

Sharp Cheddar Cheese: Sharp cheddar adds a richer, more pronounced cheese flavor that balances the creamy Alfredo sauce.

Green Onions: Sliced green onions add a fresh pop of color and a mild onion flavor that brightens the rich casserole.

🥣 How to Make Pierogi Casserole

Prep the baking dish: Preheat your oven to 350°F and lightly coat a 9×13-inch baking dish with nonstick cooking spray. Spray one side of a large piece of aluminum foil as well—this keeps the melted cheese from sticking while the casserole bakes.

Build the first layer: Arrange half of the frozen cheddar pierogies in a single layer in the prepared baking dish. Spoon half of the Alfredo sauce evenly over the top, then scatter half of the sliced kielbasa, half of the green onions, half of the mozzarella, and half of the cheddar over the sauce.

Repeat the layers: Repeat with the remaining pierogies, Alfredo sauce, kielbasa, green onions, mozzarella, and cheddar, creating a hearty, cheesy second layer.

Bake until bubbly: Cover the baking dish tightly with the prepared foil, sprayed side facing down. Bake for 20 minutes, then carefully remove the foil and continue baking for 20 to 25 minutes, or until the casserole is hot throughout and the cheese is melted and bubbly.

Let it rest: Allow the casserole to rest for about 5 minutes before serving. This gives the sauce a chance to settle, making it easier to scoop and serve.

⭐ Pro Tips

⭐ Brown the kielbasa first (optional): If you have a few extra minutes, brown the sliced kielbasa in a skillet before assembling the casserole. It adds extra smoky flavor and beautiful caramelized edges.

⭐ Don’t overbake: Bake just until the casserole is hot and bubbly. Overbaking can cause the Alfredo sauce to thicken more than you’d like.

⭐ Customize it: Stir in cooked bacon, sautéed mushrooms, spinach, or peas if you’d like to add even more flavor and color.

⭐ Let it rest before serving: Give the casserole about 5 minutes to rest after baking. It’ll be easier to serve, and the creamy sauce will have a chance to settle.

⭐ Finish with fresh green onions: A sprinkle of sliced green onions just before serving adds a fresh pop of color and brightens the rich, cheesy flavors.

What to Serve With Pierogi Casserole

Fresh + Crisp Sides: Balance the rich, cheesy casserole with my Copycat KFC Coleslaw, House Salad, Carrot Salad, or 1905 Salad for a fresh, crunchy contrast.

Easy Vegetables: Add a simple vegetable side like Southern Green Beans, Candied Carrots, or Baked Tomatoes to round out the meal.

Cozy Breads: Serve with warm 7 Up Biscuits, Garlic Bread, or Cheddar Biscuits for the ultimate comfort food dinner.

Sweet Finishes: Finish with a classic homemade dessert like Bisquick Blueberry Cobbler, Cherry Pineapple Dump Cake, or Sugar Cream Pie.

Storing + Reheating + Freezing + Make-Ahead Tips

Storing: Let the casserole cool completely, then cover the baking dish tightly or transfer leftovers to an airtight container. Store in the refrigerator for up to 4 days.

Reheating: Reheat individual servings in the microwave until hot, or warm larger portions in a 350°F oven, covered with foil, until heated through. If the sauce has thickened in the refrigerator, stir in a splash of milk before reheating to restore its creamy texture.

Freezing: Allow the baked casserole to cool completely, then wrap it tightly or transfer it to a freezer-safe container. Freeze for up to 3 months. Thaw overnight in the refrigerator before reheating for the best texture.

Make-Ahead: Assemble the casserole up to 24 hours in advance, cover tightly, and refrigerate. When you’re ready to bake, add about 10 to 15 minutes to the baking time if it’s going straight from the refrigerator.

Frequently Asked Questions

◆ Can I Make Pierogi Casserole Ahead of Time?

Yes! Assemble the casserole as directed, cover tightly, and refrigerate for up to 24 hours before baking. When you’re ready to cook, bake as directed, adding about 10 to 15 extra minutes if you’re baking it straight from the refrigerator.

◆ Can I Use a Different Kind of Pierogi?

Absolutely. While cheddar pierogi are my favorite for this casserole, potato and onion, four cheese, or potato and cheese varieties all work well. Use your family’s favorite.

◆ Can I Use a Different Sausage?

Yes! Smoked sausage, Polish sausage, turkey kielbasa, or even sliced smoked bratwurst are all delicious substitutes.

◆ Do You Have to Boil Pierogies Before Baking?

No! One of the best things about this recipe is that there’s no need to thaw or boil the frozen pierogies first. Simply layer them straight from the freezer into the casserole with the Alfredo sauce, kielbasa, and cheese. As the casserole bakes, the pierogies become perfectly tender while soaking up all that creamy, cheesy goodness.

◆ Can I Freeze Pierogi Casserole?

Yes. Let the baked casserole cool completely, then wrap it tightly or transfer it to an airtight container and freeze for up to 3 months. Thaw overnight in the refrigerator before reheating for the best texture.

Still have questions? Leave them in the comments below—I’m always happy to help!

More Comfort Food Dinner Recipes

Sausage Potato Casserole – Smoked sausage, tender potatoes, and plenty of melted cheese come together in this hearty family favorite that’s perfect for busy weeknights.

Hamburger Potato Casserole – One of my most popular family dinners, loaded with seasoned beef, tender potatoes, and plenty of melted cheese.

John Wayne Casserole – Layers of seasoned beef, biscuits, vegetables, and cheese make this a classic family comfort food dinner.

Shipwreck Casserole – This old-fashioned layered casserole is packed with hearty ingredients and baked until hot and bubbly.

Tortellini Casserole – Cheese-filled tortellini baked in a hearty meat sauce with plenty of gooey melted cheese for an easy family dinner.

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Thanks for stopping by my kitchen today — happy cooking, friends! ❤️ Kathleen

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