Slow Cooker Pierogi Casserole

Directions
Lightly coat the inside of your slow cooker with nonstick spray or a thin layer of butter to prevent sticking.
Spread half of the frozen pierogi in an even layer on the bottom. A little overlap is perfectly fine.
Scatter half of the kielbasa slices over the pierogi, then sprinkle 1 cup of shredded cheese on top.
Repeat the layering process with the remaining pierogi, kielbasa, and the final cup of cheese.
Pour the heavy cream evenly over everything. Don’t stir — the liquid will gradually seep down through the layers as it cooks.
Cover and cook on LOW for 3 to 4 hours, until the pierogi are tender and cooked through, the cheese is fully melted, and the sauce is bubbling at the edges. Resist lifting the lid during cooking to keep the heat steady.
When finished, gently fold the casserole from the edges toward the center to coat everything in the creamy sauce. Try not to break the pierogi apart.
Let the dish rest uncovered for 5 to 10 minutes — this allows the sauce to thicken slightly. Serve warm directly from the slow cooker.
Variations & Tips
Lighten it up: Swap the heavy cream for half-and-half, or use a combination of one cup cream and one cup whole milk. The sauce will still be creamy, just a touch less indulgent.

Add more depth: If you’re willing to go beyond four ingredients, layer in a thinly sliced onion and a couple of minced garlic cloves for a more savory base. A sprinkle of black pepper or smoked paprika before the lid goes on adds a subtle warmth that complements the kielbasa nicely.

Bacon upgrade: Stir in a generous handful of cooked, crumbled bacon just before serving. It adds a salty, smoky punch that pairs especially well with sharp cheddar.

Add vegetables: Layer in a cup or two of frozen peas, corn, or a mixed vegetable blend alongside the pierogi and kielbasa. They’ll cook right along with everything else and help round out the meal.

Try different pierogi varieties: This recipe works with virtually any savory frozen pierogi — potato and onion, potato and cheddar, or even sauerkraut-filled pierogi if you enjoy a tangier flavor. Just keep the total quantity roughly the same.

Prep the night before: Assemble all the layers in the slow cooker insert, cover it, and store it in the refrigerator overnight. The next morning, place the insert into the base, add an extra 10 to 15 minutes to the cook time, and you’re set.

Crispy, golden top: For a browned, bubbly finish, spoon the finished casserole into a baking dish, scatter a little extra cheese over the top, and broil for 3 to 5 minutes until golden and bubbling.

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