Side Dishes
This potato knish recipe delivers the perfect balance of crispy, flaky pastry wrapped around a hearty mashed potato and cheese filling—just like the ones from your favorite Jewish deli. 💛 The secret lies in a simple dough that transforms into golden, shatteringly crisp layers, while the savory potato filling stays rich and tender inside.
What makes this recipe special is its approachability—no fancy techniques required, just a few basic ingredients and patience for the dough to rest. The filling combines mashed potatoes with sharp cheddar and onions, creating a flavorful center that pairs beautifully with the flaky crust.
The key to success? Keeping the dough cold and handling it gently to maintain those delicate layers.
By the time you pull these knishes from the oven, you’ll have a tray of golden, crisp-edged pastries that smell like comfort food. The contrast between the crispy exterior and soft filling makes every bite satisfying, and the aroma alone will have everyone asking for seconds.
Serve warm with a dollop of sour cream or applesauce for the full experience.
This recipe works equally well as an appetizer or side dish, perfect for holiday gatherings or a cozy weeknight dinner. The dough can be made ahead, so you can focus on enjoying the results rather than the prep. Let’s get started!
Ingredients for recipe for potato knish
Fourteen ingredients for golden, crispy knishes that taste like nostalgia in every bite.
| Ingredient | Amount | Notes |
|---|---|---|
| All-Purpose Flour 🌾 | 3 ½ cups | Plus 2 tbsp for dusting |
| Unsalted Butter 🧈 | ¾ cup | Cold, cubed for dough |
| Large Eggs 🥚 | 1 whole | Room temperature |
| Water 💧 | ¼ cup | Cold, for dough |
| Salt 🧂 | 1 ½ tsp | Kosher or sea salt |
| Russet Potatoes 🥔 | 2 lbs | Starchy, peeled and cubed |
| Sharp Cheddar Cheese 🧀 | 1 ½ cups | Shredded, aged for flavor |
| Yellow Onion 🧅 | 1 whole | Medium, finely chopped |
| Sour Cream 🥛 | ¼ cup | Full-fat for richness |
| Granulated Sugar 🍚 | 1 tbsp | For potato filling |
| Ground Black Pepper 🌶️ | ½ tsp | Freshly cracked |
| Vegetable Oil 🫒 | 2 tbsp | For brushing dough |
| Poppy Seeds 🌻 | 1 tbsp | Optional for garnish |
The dough is where the magic happens. King Arthur flour or Gold Medal gives that signature flakiness—don't skimp on quality. Cold butter is non-negotiable (trust me on this), and I always use Land O'Lakes unsalted because it's consistent. The potatoes? Russets are your best bet—they're starchy enough to hold up to the cheese filling. If you're feeling fancy, grab Yukon Golds for a creamier texture, but Russets are the classic choice. Keep everything cold until you're ready to roll out the dough—warm hands make for sticky, messy dough.
No sharp cheddar on hand? Parmigiano-Reggiano or Gruyère work in a pinch, though the flavor won't be quite the same. Onion powder is a great sub for fresh onion if you're short on time (use half the amount). The sour cream adds richness, but Greek yogurt at half the quantity keeps it lighter. For the dough, if you're worried about overmixing, just remember: fold, don't stir. And if your filling seems too wet, add a pinch more flour—it's better to have it slightly dry than gummy. The poppy seeds are totally optional, but they add a nice crunchy finish that pairs perfectly with the crispy crust.
Dough keeps best wrapped in plastic for 2 days in the fridge, or freeze for up to 3 months by wrapping tightly in foil. The filling can be prepped ahead and stored in the fridge for 1 day—just don't assemble the knishes until you're ready to bake. These reheat beautifully: 350°F for 10-15 minutes until golden and crispy again. Pro tip: Serve with extra sour cream or a sprinkle of poppy seeds on top—it's like a little flavor hug. And if you make extras? They freeze beautifully too—just thaw at room temperature before reheating.
Why You'll Love This Recipe
- No-Knead Magic: I swear by this dough—just flour, butter, and water. No stand mixer, no fuss, and that flaky, melt-in-your-mouth texture? It’s all from folding butter into cold dough until it’s almost crumbly. Honestly, I’ve made it wrong three times, but now it’s my go-to for anything that needs a crispy wrapper.
- Golden Crisp Edge: That first bite when the knish hits the pan—crispy, buttery crust giving way to soft dough? It’s the butter doing all the work here. I use cold, cubed butter folded into the dough, and trust me, the payoff is worth the extra five minutes of kneading (well, folding).
- Potluck Hero: Between us, this is the dish I bring to gatherings when I don’t want to stress. Freeze half the dough ahead, fill with whatever’s on hand (savory potato, sweet jam, even leftover mashed potatoes), and bake while everyone else is still debating what to bring. It’s unfussy, impressive, and no one will guess it took me 20 minutes to prep.
- Budget-Friendly Staple: Flour, butter, eggs—these are the basics I already have. A single batch of dough stretches for four knishes, and leftovers reheat like a dream. I’ll be real: my college budget thrived on this. Now it’s my secret weapon for feeding the family without breaking the bank.
Step-by-step instructions for potato knish
Here's how to make these golden, flaky knishes that'll have everyone begging for seconds.
🍳 Step 1: Cook the Potato Filling to Perfection
Peel and cube the 2 lbs russet potatoes into even ½-inch pieces—this ensures they cook uniformly. Place them in a pot of cold, salted water and bring to a boil over medium-high heat. Once boiling, reduce to medium heat and simmer for 15-20 minutes until fork-tender but not mushy.
Drain the potatoes and return them to the pot. Add the 1 whole yellow onion (finely chopped), 1 tbsp granulated sugar, and 0.5 tsp ground black pepper. Mash everything together with a potato masher or fork until you get a rustic, chunky texture—you want some potato pieces to remain intact for texture. Let the mixture cool for 5 minutes before handling.
👨🍳 Step 2: Make the Dough for Flaky Layers
In a large bowl, combine the 3.5 cups all-purpose flour and 1.5 tsp salt. Cut in the 0.75 cup cold unsalted butter using a pastry cutter or your fingers until the mixture resembles coarse crumbs with pea-sized butter pieces. Add the 1 whole large egg and 0.25 cup cold water, then mix gently with a fork until just combined—don't overwork the dough.
Turn the dough onto a lightly floured surface and knead it 5-6 times until smooth. Wrap it tightly in plastic wrap and chill in the refrigerator for at least 30 minutes (or up to 2 hours). This resting time is crucial—it relaxes the gluten and makes the dough easier to roll out without tearing.
🥘 Step 3: Assemble and Shape the Knishes
Preheat your oven to 375°F. Divide the chilled dough into 4 equal pieces (about 12 oz each) and roll each piece into a 12-inch circle on a floured surface, keeping the thickness even at about ⅛ inch. Brush the edges with 2 tbsp vegetable oil to prevent sticking.
Spoon about ½ cup of the cooled potato filling onto each dough circle, leaving a 1-inch border around the edges. Fold the dough over the filling to create a half-moon shape, then seal the edges by pinching them tightly together with your fingers. Place the sealed knishes seam-side down on a parchment-lined baking sheet.
🔥 Step 4: Bake Until Golden and Crispy
Brush the tops of the knishes with an egg wash (beat the remaining 1 whole large egg with 1 tbsp water and brush it on). Bake for 30-35 minutes until the tops are deep golden brown and the filling is bubbling. If they brown too quickly, tent them loosely with foil to prevent burning.
For extra crispiness, I like to broil for 1-2 minutes at the end—just watch them like a hawk so they don't burn. Remove from the oven and let them cool for 5 minutes before serving. Sprinkle with 1 tbsp poppy seeds right before eating for that classic knish touch.
⏰ Step 5: Serve Warm with Sour Cream
Slice each knish into 4 wedges and serve warm with a dollop of 0.25 cup sour cream on the side. The contrast of the creamy sour cream with the crispy, cheesy knish is pure magic. These taste even better the next day when the crust gets extra crispy—just reheat in a 350°F oven for 10 minutes to restore that golden crunch.
Pro Tips For Making Recipe For Potato Knish
- CHILL THE DOUGH: After kneading the dough, stash it in the fridge for at least 30 minutes—yes, even if you’re itching to start shaping. I used to skip this and wondered why my knishes always felt dense or tough. Cold dough handles better, seals tighter when folded, and gives you crispier edges later.
- CUT BUTTER IN SMALL: When mixing the dough, chop that unsalted butter into tiny cubes—think rice grains, not dice. Big chunks melt unevenly, leaving pockets of grease that make your knish dough gummy. Use a sharp knife and work fast to keep everything cold.
- SEAL THE EDGES WELL: Pinch the knish edges like you’re closing a jar—press firmly and smooth any rough spots. I learned this after a batch leaked filling all over my baking sheet. A tight seal means no soggy bottoms and a cleaner, more professional look.
- USE A LIGHT HAND: Handle the dough as little as possible after shaping—overworking it makes knishes tough. Once folded, just smooth the top lightly with your fingers. The less you touch it, the flakier and lighter the texture. (I know, it feels counterintuitive.)
Troubleshooting this recipe
Dough Too Sticky
If your dough feels too sticky when rolling, resist the urge to add more flour—it can make the crust tough. Instead, chill it for an extra 15-20 minutes to firm up. Work quickly with cold hands and a lightly floured surface.
I’ve found that King Arthur flour absorbs moisture better than some store brands, so if you’re using a different flour, you might need 1-2 extra tablespoons of flour for dusting. 💡
Filling Too Wet
A soggy filling ruins the texture, so if your mashed potatoes feel too moist, add 1-2 tablespoons of all-purpose flour to absorb excess liquid. For extra insurance, let the filling cool completely before assembling.
I’ve had success adding 1 tablespoon of cornstarch to the potato mixture while mashing—it helps thicken without altering flavor. 🥔
Knishes Not Crispy
Underbaked knishes lack crispiness, but overbaking leads to dryness. Aim for 30-35 minutes at 375°F until golden brown. For extra crunch, brush the dough with vegetable oil before baking, and broil for 1-2 minutes at the end.
If your oven runs hot, reduce the temperature to 350°F and bake longer. A toothpick test works: insert it into the filling—it should come out clean. 🔥
Edges Not Sealing
If the dough edges won’t stay sealed, your filling might be too large or the dough too thin. Use ½ cup filling per knish and leave a 1-inch border around the edges. Press the edges firmly together with your fingers, then use a fork to crimp them tightly.
For extra security, brush the sealed edges with egg wash before baking—it acts as a glue. 🍳
Filling Leaking
Leaky knishes usually mean the dough was too thin or the filling too wet. Roll the dough to a consistent ⅛-inch thickness and ensure the filling is fully cooled before assembling. If leaks persist, try pressing the dough edges with a fork to create a tighter seal.
Another trick? Chill the assembled knishes for 10 minutes before baking—the cold helps the dough firm up. 💨
Dough Tearing
Tearing happens when dough isn’t rested long enough or is too warm. Let the dough chill for the full 30-60 minutes before rolling, and work on a clean, floured surface.
If it tears while rolling, patch it with extra dough scraps or use a damp paper towel to smooth out rough edges. I’ve also had luck using a rolling pin with a smooth, even surface—avoid serrated pins that can snag the dough. ✨
Nutrition facts
Frequently asked questions
Can I make potato knishes ahead of time?
The dough can be wrapped and refrigerated for 2 days or frozen for 3 months. For the filling, prep it ahead and store it in the fridge for 1 day, but don't assemble the knishes until you're ready to bake. Reheat from frozen at 350°F for 15-20 minutes until golden and crispy again. The crust gets even better the next day!
What's the best way to store leftover knishes?
Keep them in an airtight container at room temperature for 2-3 days—they'll stay crispy! For longer storage, freeze them (unbaked or baked) for upstrong> 3 months. To reheat, bake at 350°F for 10-15 minutes until warmed through. Microwaving makes them soggy, so avoid that method.
Can I make smaller or larger knishes?
Yes! This recipe makes 4 large knishes, but you can easily adjust. For smaller ones, divide the dough into 6-8 pieces and use ⅓ cup filling each. For giant knishes, use the full dough for 2 knishes with ¾ cup filling per half-moon. Just ensure the dough is ⅛-inch thick for even baking.
What are some variations for the filling?
Classic potato knishes are savory, but you can experiment! Try adding ½ cup cooked ground beef or shredded chicken to the filling. For a vegetarian twist, swap cheese for caramelized onions or mushrooms. Sweet versions use cinnamon, raisins, or applesauce instead of cheese—just adjust the sugar to taste.
Why is my knish dough tearing when I roll it?
This usually happens when the dough isn't rested long enough or is too warm. Chill it for the full 30-60 minutes before rolling, and work on a lightly floured surface with cold hands. If it tears, patch with extra dough scraps or use a damp paper towel to smooth edges. A smooth rolling pin helps prevent snags—avoid serrated ones!