Potato Knishes

Potato knishes are traditional Jewish snacks made from mashed potatoes, onions, and simple flour dough. These have a tender and garlicky filling encased with crispy dough.

I'm helping you make them perfectly with whatever tools you have on hand, whether that's a food mill or a wooden spoon. This recipe can be made with zero fancy equipment and produce tasty knishes.

Potato knishes are traditionally on the blander side, so I'm also sharing some spice combinations you can add to the filling if you're not interested in the classic.

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Why this Recipe Works

When roasted and then milled to a fine consistency, potato makes a soft and tender filling for these knishes. The simple flavor is injected into the filling with sauteed onions and garlic, making the perfect savory bite.

This dough is not intimidating or difficult at all, and it's really easy to form with just flour, water, and oil.

You don't need a stand mixer for the dough, as a hand mixer with a dough hook will do just as good a job.

Since potato knishes are traditionally on the bland side, I share some spice additions you can make if you're interested in more of a flavor punch. Or, you can go for the traditional flavors simply by not adding them.

Ingredients & Substitutions

flour – all-purpose flour is all you need to make this recipe.

Vegetable oil – You can substitute with other flavorless oils like canola oil or sunflower seed oil.

Potatoes – use Russet potatoes as they have a higher starch content that yields the perfect consistency.

Onion – I use a yellow onion in this recipe, but you can substitute sweet or white onions.

Scallions – add a different layer of onion flavor that is different from the yellow onions.

Garlic – I prefer fresh garlic in this recipe, but you can substitute ½ teaspoon of garlic powder.

Egg yolk or vegan substitute – helps give the pastry a golden brown color when cooked. You can substitute with aquafaba or a spray of oil to make this recipe vegan. It won't brown as well, but will still be delicious.

How to make this recipe

The directions below separate each task: preparing the potatoes, making the flour dough, cooking the onions, and bringing it all together.

To be the most efficient, make and rise the dough and caramelize the onions while the potatoes roast in the oven. By then, your potatoes will be ready to break down and turn into your filling and finally bake the potato knishes.

Prepare the potatoes

Preheat your oven to 425°F. Take your potatoes, and poke them 6 times per potato with a fork. Then, lightly oil the potatoes and season them generously with sea salt.

Bake for ~1 hour until they are tender when prodded with a fork.

While the potatoes are still warm (as hot as you can handle), peel the skin off. As soon as they are peeled (and still warm), run them through a food mill to get a nice even mash.

Note: If you do not have a food mill, break them up with a wooden spoon into tiny pieces or mash them with a masher – try to get them as tiny as you have the patience for! The tinier, the better.

At this point, you can leave the potatoes to cool and come back to it later, or continue with the next step. 

Make the flour dough

Combine your flour and a pinch of salt in your stand mixer bowl with the dough hook attachment. As an alternative, you can use a large bowl and use a hand mixer with the dough mixer attachments.

While running the mixer on the lowest setting, add 1⁄3 cup water and 2 teaspoons of oil until the dough forms a rough ball.

Turn the dough out onto a lightly floured surface and knead it until smooth by hand, which should take about 15 minutes.

Once the dough is nice and smooth, transfer it to a lightly oiled clean bowl, cover with plastic wrap or a silicone lid and leave it to rise for 30 minutes. 

Make the onion filling

Next, heat ½ cup of oil in a large skillet over medium heat. Add the finely diced onions and scallion whites to the skillet and cook, often stirring, until they start to brown and caramelize. This takes about 20 minutes.

Then, add in the minced garlic and the rest of the scallions and cook for just one more minute. Transfer the whole thing to the bowl with the milled potatoes. Season to taste with salt and set the filling aside.

Note: Potato knishes are traditionally on the blander side. Seasoning with just salt is enough for some, but not others. I've provided some spice-addition ideas in case this is too boring for you.

Bring it all together

Preheat the oven to 375°F. Line a large baking sheet with a silicone baking mat or parchment paper and set it aside.

Divide the dough into 8 even pieces, then shape each one into a ball. Roll out one dough ball at a time on a lightly floured surface into a 7" circle. Brush the surface of the dough with some of the remaining oil.

Mound about 1 cup of the potato filling in the center of the dough and fold the dough up and around the sides. Leave the top of the filling exposed. Overlap the edges of the dough to make a snug fit around the filling. It doesn't have to be too neat!

Note: Make one knish at a time, keeping the remaining dough covered to prevent it from drying out.

Transfer the knishes to your pre-prepared baking sheet, brush them with egg wash (the yolk and 1 tablespoon of water), and bake until lightly golden, about 30 minutes.

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