Baked Pierogi Casserole with Potato, Cheese, and Caramelized Onions

By , Test Kitchen Director · Reviewed by AislePrompt Editorial · ·

Layers of tender pierogi, creamy mashed potatoes, melted cheese, and sweet caramelized onions baked to golden perfection. This ukrainian-inspired comfort food ready in about 60 minutes layers frozen potato pierogi, large, thinly sliced yellow onion, unsalted butter into a dessert worth slowing down for — great for weekend baking, holiday tables, or any time you want a sweet payoff at the end of a meal. Each serving lands at about 480 calories and feeds 6, so it slots into a weekend bake or a special-occasion dessert tray. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 20 min Cook: 40 min Serves 6 Ukrainian cuisine 480 cal/serving
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Ingredients

Instructions

  1. Step 1: Preheat oven to 375°F. Bring a large pot of salted water to a boil and cook 24 frozen potato pierogi for 3-4 minutes until they float to the surface. Drain well.
  2. Step 2: In a large skillet, melt 4 tablespoons unsalted butter over medium heat. Add 2 large thinly sliced yellow onions and cook for 15-20 minutes, stirring occasionally, until onions are deeply caramelized and golden brown.
  3. Step 3: In a 9x13-inch baking dish, spread a thin layer of sour cream (about 1/4 cup), then arrange half of the cooked pierogi in a single layer. Sprinkle 1 cup shredded sharp cheddar cheese evenly over the pierogi.
  4. Step 4: Add half of the caramelized onions over the cheese, then layer the remaining pierogi on top. Spread the remaining sour cream (3/4 cup) over the pierogi and sprinkle with the remaining 1 cup cheddar cheese.
  5. Step 5: Season with 1 teaspoon salt and 1/2 teaspoon black pepper evenly over the top. Bake uncovered for 25-30 minutes until the cheese is bubbly and golden.
  6. Step 6: Garnish with 2 tablespoons chopped chives before serving warm.

Equipment for this recipe

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Frequently asked questions

How long does Baked Pierogi Casserole with Potato, Cheese, and Caramelized Onions take to make?

Total time is about 60 minutes (20 min prep + 40 min cook). Most home bakers find this fits a weekend afternoon; chill or store as the recipe directs before serving.

How do I store leftover Baked Pierogi Casserole with Potato, Cheese, and Caramelized Onions?

Cool fully before storing. Most baked desserts keep at room temperature in an airtight container for 2–3 days, or in the fridge for up to 5 days. Cream- or custard-based desserts must go in the fridge within 2 hours; reheat gently or serve cold per the recipe.

Can I substitute ingredients in Baked Pierogi Casserole with Potato, Cheese, and Caramelized Onions?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Baked Pierogi Casserole with Potato, Cheese, and Caramelized Onions for a different number of people?

The recipe is written for 6 servings. Multiply each ingredient by (your serving target / 6). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

What goes well with Baked Pierogi Casserole with Potato, Cheese, and Caramelized Onions?

Ukrainian comfort food like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.

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