Steam N Mash Pierogi Casserole

Discover the ultimate in comfort food with this Steam N Mash Pierogi Casserole—an ingenious twist on a Polish classic. Combining layers of tender lasagna noodles with rich, creamy mashed potatoes infused with caramelized onions, sharp cheddar cheese, and sour cream, this dish offers a hearty, indulgent meal that’s perfect for family gatherings or cozy nights in. Topped with bubbling golden cheese and optional garnishes like crispy bacon and fresh green onions, every bite delivers satisfying flavors and textures. Quick to assemble using frozen steam-and-mash potatoes, this casserole is an easy and delicious way to bring the essence of pierogis to your table—without the hassle of making dough. Perfect for serving a crowd, this bake is bound to become your new favorite comfort food classic!

Nutriscore Rating: 64/100

Prep Time:20 mins

Cook Time:40 mins

Total Time:60 mins

Servings: 8

Ingredients

• 24 oz frozen steam-and-mash potatoes
• 4 tbsp unsalted butter
• 1 large yellow onion, finely chopped
• 2 cups sharp cheddar cheese, shredded
• 1 cup sour cream
• 0.5 cup milk
• 1 tsp garlic powder
• 1 tsp salt
• 0.5 tsp black pepper
• 9 sheets lasagna noodles
• 2 tbsp green onions, thinly sliced (optional)
• 4 slices bacon, cooked and crumbled (optional)

Directions

Step 1

Preheat your oven to 375°F (190°C). Grease a 9x13-inch baking dish lightly with cooking spray or butter.

Step 2

Prepare the steam-and-mash potatoes according to the package instructions (usually involves microwaving or steaming). Once cooked, mash the potatoes until smooth and set aside.

Step 3

In a large skillet, melt 2 tablespoons of butter over medium heat. Add the chopped onion and cook for 8-10 minutes, stirring occasionally, until caramelized and golden brown. Remove from heat and set aside.

Step 4

In a large mixing bowl, combine the mashed potatoes, caramelized onions, 1.5 cups of shredded cheddar cheese, sour cream, milk, garlic powder, salt, and black pepper. Mix until fully blended and creamy.

Step 5

Bring a large pot of salted water to a boil. Cook the lasagna noodles according to package instructions until al dente. Drain and lay the noodles flat on a clean surface to prevent sticking.

Step 6

Assemble the casserole: Lay 3 lasagna noodles across the bottom of the greased baking dish. Spread one-third of the mashed potato mixture evenly over the noodles. Repeat this process two more times, ending with the mashed potato mixture on top.

Step 7

Sprinkle the remaining 0.5 cup of shredded cheddar cheese evenly over the top layer of mashed potatoes.

Step 8

Dot the top of the casserole with the remaining 2 tablespoons of butter, cut into small pieces.

Step 9

Cover the baking dish with aluminum foil and bake in the preheated oven for 25 minutes. Remove the foil and bake for an additional 15 minutes, or until the top is golden and bubbling.

Step 10

Remove the casserole from the oven and allow it to rest for 5-10 minutes before serving. Garnish with sliced green onions and crumbled bacon, if desired.

Step 11

Serve warm and enjoy this hearty and comforting dish!

Nutrition Facts

Serving size	(2048.6g)

Amount per serving	% Daily Value*
Calories	4507.5

Total Fat 204.3g	0%
Saturated Fat 117.0g	0%
Polyunsaturated Fat 0.1g
Cholesterol 550.0mg	0%
Sodium 5265.1mg	0%
Total Carbohydrate 543.4g	0%
Dietary Fiber 30.4g	0%
Total Sugars 50.6g
Protein 164.7g	0%

Vitamin D 101.7IU	0%
Calcium 2260.0mg	0%
Iron 23.2mg	0%
Potassium 3186.9mg	0%

*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Source of Calories

Fat: 39.4%

Protein: 14.1%

Carbs: 46.5%