Sweet Potato Knish Recipe: Flaky Pastry Hugs Roasted Sweetness

This sweet potato knish recipe brings Ashkenazi tradition to your kitchen with layers of flaky dough hugging spiced roasted sweet potato filling. The secret lies in a simple yet sturdy dough that rests overnight, developing depth while the filling's cinnamon-sugar caramelization creates that signature sweetness.

I perfected this version after years of testing—no shortcuts, just authentic texture and flavor.

The dough combines basic pantry staples—flour, yeast, butter, and water—mixed just until combined before resting. Meanwhile, the filling transforms boiled sweet potatoes into a tender, fragrant mash with just enough sugar and cinnamon to balance natural sweetness.

The key is letting the dough rest fully before rolling, which ensures that signature flaky, melt-in-your-mouth texture that makes every bite worth the effort.

When assembled and baked, these knishes emerge with golden, crisp edges and a tender center that practically melts in your mouth. The filling stays moist and flavorful, while the dough develops a delicate crispness that contrasts beautifully. This is comfort food at its finest—warm, inviting, and deeply satisfying.

Serve warm with a sprinkle of cinnamon sugar or a dollop of sour cream for the full experience. The dough can be made ahead, and the filling prepped in advance, making this an ideal make-ahead recipe for gatherings.

Whether you're recreating a taste of home or introducing a new tradition, these knishes deliver on both nostalgia and quality.

Ingredients for sweet potato knish

Sixteen ingredients. One overnight rest. The secret to flaky layers and spiced sweetness lies in these basics.

The flour matters here—King Arthur or Bread Flour for that extra chewiness, but all-purpose works fine if that's what you've got. Yeast is non-negotiable for that signature rise, so check the expiration date (fresh is best). For the sweet potatoes, orange-fleshed varieties like Beauregard are ideal—they're sweeter and creamier. If you can't find them, regular sweet potatoes work, but they'll be slightly less flavorful. The butter should be cold and cubed when mixing—this keeps the dough tender without melting. I always grab European-style butter from Trader Joe's if I'm doing a big batch, but regular unsalted butter is perfect for home cooking.

No cinnamon sugar mix? Whisk your own—just combine equal parts ground cinnamon and sugar. Short on sour cream? Greek yogurt thinned with a splash of milk works perfectly. The dough can handle substitutions, but the filling is where you want to be precise. For the sweet potatoes, boil until fork-tender—overcooking turns them mushy, and that's a texture crime in knishes. No yeast? Instant yeast is a direct swap, but make sure to dissolve it in warm water first. The dough needs to rest overnight—this isn't optional. It develops the gluten and flavor that makes these knishes restaurant-worthy.

The dough keeps up to 3 days in the fridge, wrapped tightly in plastic. The filling can be prepped 2 days ahead and stored separately. For assembly, roll the dough thin but not paper-thin—about 1/8-inch thickness. Bake until golden (375°F for 20-25 minutes), and brush with extra sour cream while warm for that signature tender crust. These reheat beautifully—350°F for 10 minutes brings them back to life. Freeze unbaked knishes for up to 2 months—just add 5 minutes to baking time when thawed.

Step-by-step instructions for sweet potato knish

Here's how to create golden, flaky knishes that perfectly balance sweet potato filling with crisp pastry layers.

Preheat your oven to 375°F and line a baking sheet with parchment paper. Peel and cube the 3 lbs sweet potatoes into ½-inch pieces. Toss them with 2 tbsp vegetable oil, ½ tsp salt, and 1 tsp cinnamon until evenly coated.

Spread the sweet potatoes in a single layer on the prepared baking sheet. Roast for 25-30 minutes until tender and caramelized at the edges. You'll know they're done when a fork slides in easily and the edges are deep golden brown. Transfer the roasted sweet potatoes to a mixing bowl and mash them until smooth with a potato masher or fork.

Stir in the ½ cup granulated sugar and 1 tsp cinnamon until fully combined. The mixture should be thick and spreadable, with a rich caramel color. Taste and adjust seasoning if needed—this is your flavor foundation. Let the filling cool completely before using to prevent steam from making the dough soggy.

In a small bowl, dissolve the ½ tsp granulated sugar in the ¾ cup warm water (about 110°F). Sprinkle the ¼ tsp active dry yeast over the sugar water and let sit for 5-10 minutes until foamy. This activates your yeast for perfect rise.

In a large mixing bowl, combine the 4 cups all-purpose flour and ½ tsp salt. Cut in the ½ cup cold unsalted butter using a pastry cutter or your fingers until the mixture resembles coarse crumbs. Make a well in the center and pour in the yeast mixture along with the 1 whole large egg and ¼ cup sour cream.

Mix gently with a wooden spoon until the dough begins to come together, then turn it out onto a lightly floured surface. Knead for 5-7 minutes until smooth and elastic. The dough should be slightly tacky but not sticky. Wrap it in plastic wrap and refrigerate for 1 hour to firm up—this resting period develops gluten for that signature flaky texture.

Preheat your oven to 375°F and line two baking sheets with parchment paper. Roll out the chilled dough on a lightly floured surface to about ⅛-inch thickness. Cut into 6 equal rectangles (about 4x6 inches) using a sharp knife or pizza cutter.

Place 2-3 tablespoons of the sweet potato filling on the short end of each dough rectangle, leaving a 1-inch border around the edges. Fold the long sides inward over the filling, then roll tightly from the open end to completely enclose the filling. Seal the edges by pinching with your fingers or using a fork to crimp.

Place the knishes seam-side down on the prepared baking sheets, spacing them about 1 inch apart. Brush the tops with a little water using a pastry brush, then sprinkle generously with the 2 tbsp cinnamon sugar. The sugar will caramelize beautifully during baking, creating that perfect sweet contrast to the flaky pastry.

Bake the knishes for 20-25 minutes until they're deep golden brown and puffed slightly at the seams. The edges should be crisp, and you should smell that wonderful caramelized sweetness filling your kitchen. For extra browning, you can broil for 1-2 minutes at the end, watching closely to prevent burning.

Let the knishes cool on a wire rack for 5-10 minutes before serving. The filling will be hot and gooey inside, while the pastry remains crisp and flaky. Serve warm with a dollop of whipped cream or a scoop of vanilla ice cream for the ultimate comfort food experience. These knishes keep well at room temperature for 2 hours, so you can make them ahead and reheat in a 350°F oven for 10 minutes to restore their crispness.

Perfect pairings for this dish

Classic Serving Ideas

Serve warm knishes with a dollop of homemade sour cream or vanilla bean ice cream to balance the sweetness. I love adding a sprinkle of toasted chopped walnuts for crunch—just toast ¼ cup walnuts in a dry pan for 3-4 minutes until fragrant.

For a nostalgic touch, pair with hot black coffee to cut through the richness. 🥛

Savory Twist Pairings

For a savory variation, swap the cinnamon sugar topping for everything bagel seasoning—just mix 1 tbsp sesame seeds, 1 tsp poppy seeds, ½ tsp garlic powder, and ½ tsp onion powder.

Serve with smoked salmon or cream cheese for a brunch-friendly twist. The dough’s flakiness pairs beautifully with bold flavors like these. 🥒

Drink Pairings

A spiced chai latte or vanilla chai tea complements the warm spices in the filling perfectly. For something lighter, try sparkling apple cider—its acidity brightens the sweetness. Avoid overly sweet drinks like milkshakes, which can overpower the knishes’ delicate balance. 🍵

Make-Ahead Serving

Knishes reheat beautifully—pop them in a 350°F oven for 10 minutes to restore crispness. Store leftovers in an airtight container for up to 3 days. For parties, assemble knishes ahead, refrigerate, and bake just before serving. The filling stays moist, and the dough crisps up perfectly. 📅

Frequently asked questions