If you love hearty, comforting meals that come together easily, then you’ve got to try this Potato Knish Casserole! It’s everything you love about the classic knish—flaky pastry, creamy potatoes, and savory seasonings—served in a warm, bubbly casserole form.

Why You’ll Love This Recipe: This Potato Knish Casserole is the perfect twist on a traditional dish. Think of it as the ultimate comfort food—soft, creamy mashed potatoes, crispy, golden layers of dough, and just the right amount of seasoning. It’s a satisfying, filling dish that works wonderfully as a side or even as the main event for a cozy dinner. Best of all, it’s simple to put together and comes together in one pan, making cleanup a breeze!

Ingredients (Full list of ingredients below):

Frozen puff pastry
Potatoes (peeled and cubed)
Onion
Olive oil
Salt and pepper
Garlic powder
Cream cheese
Sour cream
Butter
Egg (for egg wash)

Directions:

Step 1: Prepare the potatoes
Start by peeling and cubing the potatoes. Place them in a large pot, cover with water, and bring to a boil. Cook the potatoes for about 10-12 minutes, or until they’re fork-tender. Drain and set them aside.

Step 2: Make the filling
While the potatoes are boiling, heat olive oil in a pan and sauté the onions until they’re golden brown and soft. This will add a nice depth of flavor to the casserole. Once the potatoes are done, mash them with cream cheese, sour cream, butter, salt, pepper, and garlic powder until smooth and creamy. Stir in the sautéed onions for that perfect savory touch.

Step 3: Assemble the casserole
Roll out the frozen puff pastry on a floured surface. Cut it into strips that will fit the sides of your baking dish. Grease a casserole dish, then layer one strip of pastry along the bottom and up the sides. Add the mashed potato mixture on top, spreading it evenly across the dish. Cover with another layer of pastry on top, folding the edges in neatly. Brush the top with a beaten egg for a golden finish.

Step 4: Bake to perfection
Bake the casserole in a preheated oven at 375°F for about 30-35 minutes, or until the pastry is golden brown and crisp. Let it cool slightly before slicing and serving. The pastry will be flaky, the potatoes creamy, and the flavors simply irresistible!

Expert Tips and Tricks:

If you want a little more flavor, try adding sautéed mushrooms or grated cheese to the mashed potato mixture.
If puff pastry feels too heavy, you can substitute it with phyllo dough for a lighter, crispier result.
For a shortcut, you can use pre-made mashed potatoes, but the homemade version makes all the difference!

Recipe Variations and Possible Substitutions:

Add cooked ground beef or sausage to the mashed potato filling for a meatier dish.
If you prefer a vegetarian version, try adding some spinach or kale to the filling for a healthy twist.
To make the casserole a bit lighter, swap out the sour cream and cream cheese for Greek yogurt.

Serving and Pairing Suggestions: This casserole is perfect for pairing with a simple green salad or roasted vegetables. You could even serve it alongside grilled chicken or a hearty soup for a more filling meal. It’s great for family dinners, potlucks, or holiday gatherings—everyone will love the flavors!

Storage and Reheating Tips: Store leftovers in an airtight container in the refrigerator for up to 3 days. To reheat, cover the casserole with foil and warm it in the oven at 350°F for 10-15 minutes. It’s just as delicious the next day!

4 FAQs:

Can I make this casserole ahead of time? Yes! You can assemble the casserole a day ahead and store it in the refrigerator. Just bake it when you’re ready to serve.
Can I freeze Potato Knish Casserole? Absolutely! Freeze it before baking, and when you’re ready to bake it, just pop it in the oven from frozen. You may need to add a few extra minutes of baking time.
Can I make this with a different type of pastry? Yes, you can substitute puff pastry with phyllo dough, pie crust, or even crescent roll dough for a different texture and flavor.
Can I use instant mashed potatoes for this recipe? You can, but I highly recommend making homemade mashed potatoes for the best texture and flavor. Instant potatoes can sometimes be a bit grainy.

Conclusion: This Potato Knish Casserole is the ultimate comfort food that combines rich, creamy mashed potatoes with a crispy, flaky pastry crust. It’s a cozy, satisfying dish that will leave everyone asking for seconds. Whether you’re making it for a special occasion or just a weeknight dinner, it’s guaranteed to be a hit!

This Potato Knish Casserole Will Be Your New Comfort Food Favorite!

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Craving something savory, warm, and irresistible? These stuffed pretzel bites hit the spot every time. Soft, doughy, and filled with cheesy goodness, they’re perfect for game nights or just a cozy snack!

Author: Touria Elkoudssi
Prep Time: 20 minutes
Cook Time: 45 minutes
Total Time: 1 hour 5 minutes
Yield: 6-8 servings
Category: Casserole, Comfort Food
Method: Baking
Cuisine: Eastern European
Diet: Vegetarian

Instructions

Prepare the potatoes
Peel and cube the potatoes. Place them in a large pot, cover with water, and bring to a boil. Cook for about 10-12 minutes or until fork-tender. Drain and set aside.
Make the filling
While potatoes are boiling, sauté the onions in olive oil until golden brown. Mash the cooked potatoes with cream cheese, sour cream, butter, salt, pepper, and garlic powder until smooth and creamy. Stir in the sautéed onions.
Assemble the casserole
Roll out the puff pastry on a floured surface and cut into strips. Grease a casserole dish and layer one strip of pastry along the bottom and up the sides. Add the mashed potato mixture and spread evenly. Cover with another layer of pastry and fold the edges neatly. Brush with egg wash for a golden finish.
Bake to perfection
Bake at 375°F for 30-35 minutes or until the pastry is golden brown and crispy. Let it cool slightly before slicing and serving.

Notes

For added flavor, consider adding sautéed mushrooms or grated cheese to the potato mixture.
Phyllo dough can be used as a lighter alternative to puff pastry.
Using homemade mashed potatoes improves texture and flavor.