Crispy Turkish Potato Borek with Golden Phyllo Layers Step-by-step instructions

Before you start

Before starting, make sure the potatoes are boiled and ready to mash. Caramelize the onions while the potatoes cook to save time. Have all ingredients measured and within reach. Preheat the oven to 375°F (190°C).

Brush the baking tray with olive oil. If using frozen phyllo, thaw it overnight in the refrigerator and keep it covered with a damp cloth while working to prevent drying. Whisk the sauce wash just before layering.

Instructions

Filling and Wash

1. 1Prepare the Potato Filling
   Boil the potatoes in salted water until fork-tender, about 20 minutes. Drain and let cool slightly. Meanwhile, heat a skillet over medium heat with a drizzle of olive oil. Add the diced onion and cook, stirring occasionally, until deeply golden and caramelized, about 15 minutes. Mash the potatoes in a large bowl, then stir in the caramelized onions, pul biber, black pepper, salt, and chopped parsley. Mix until smooth and season to taste.
   Look for The filling is creamy with visible caramelized onion bits and flecks of parsley.
   Tip For extra smoothness, push the mashed potatoes through a ricer before mixing.
2. 2Make the Sauce Wash
   In a medium bowl, whisk together the eggs, milk, yogurt, and olive oil until completely combined and slightly frothy. Set aside.
   Look for The wash is pale yellow and smooth, with no streaks of egg.
   Tip Whisk thoroughly so the yogurt is fully incorporated; a smooth wash soaks the phyllo evenly.

At the end of this phase, you have a creamy, well-seasoned potato filling with caramelized onions and a smooth, pourable sauce wash.

The filling should be thick enough to hold its shape, and the wash should be uniform with no streaks. The onions are deeply golden and sweet, and the parsley is evenly distributed. Everything is ready to assemble.

Layering and Assembly

3. 3Layer the Phyllo with Wash
   Preheat the oven to 375°F (190°C). Brush the bottom and sides of a 9x13-inch baking tray with olive oil. Place one sheet of yufka in the tray, crumpling it slightly to fit. Brush or drizzle generously with the sauce wash. Repeat with two more sheets, each soaked with wash, making sure the entire surface is moistened.
   Look for The phyllo sheets are soft and fully saturated, with no dry spots.
   Tip Don't worry about neat folds; crumpling creates those craggy, crispy edges.
4. 4Spread the Potato Filling
   Evenly spread the mashed potato filling over the soaked phyllo layers, reaching all the way to the edges. Press gently to compact the filling.
   Look for The filling covers the entire tray in an even, smooth layer.
   Tip Use an offset spatula for an even spread without tearing the phyllo.
5. 5Top with Remaining Phyllo
   Place the remaining two yufka sheets over the filling, crumpling them loosely and tucking the edges down into the tray. Pour any remaining sauce wash over the top, using a pastry brush to ensure every surface is moistened. Sprinkle with nigella seeds and sesame seeds.
   Look for The top is fully coated with wash and scattered with seeds.
   Tip Don't skimp on the wash on the top layer—it's what creates the golden, crackly crust.

The tray is filled with crumpled phyllo layers, each soaked with the egg-milk wash. The potato filling is spread evenly, and the top is covered with remaining phyllo, brushed with wash, and sprinkled with nigella and sesame seeds. The surface looks moist and speckled. The edges are tucked in, and the tray is ready for the oven.

Baking and Finishing

6. 6Bake Until Golden and Crispy
   Bake in the preheated oven for 35 to 40 minutes, until the top is deep golden amber and puffed. The filling should be hot and the edges visibly crisp. If the top browns too quickly, tent loosely with foil.
   Look for The borek is puffed, golden, and the edges are crackling.
   Safe temperature 160°F (71°C) internal temperature (egg dishes)
   Tip Rotate the tray halfway through baking for even browning.
7. 7Rest and Slice
   Let the borek rest for 10 minutes before slicing. Use a sharp knife to cut into squares or rectangles. Serve warm, with a crisp crackle as you cut.
   Look for The layers hold together and the filling is set.
   Tip Resting helps the layers set, making cleaner slices.

The borek emerges from the oven puffed and golden amber, with a crackling top and visible crisp edges. The seeds are toasted and fragrant. After a short rest, slicing reveals distinct layers with a creamy, savory filling. The aroma is buttery, slightly spicy, and utterly inviting.

Common mistakes

One common mistake is not soaking the phyllo thoroughly with the sauce wash, leading to dry, brittle layers. Be generous with the wash on every sheet. Another is overworking the phyllo—crumple it gently, don't press too hard.

If the top browns too quickly, tent with foil. Avoid underbaking; the center should be fully set, not doughy. Also, don't skip the rest time after baking; slicing too soon can cause the layers to separate and the filling to slide.

How to tell it’s done

The borek is done when the top is deep golden amber and puffed, and the edges are visibly crisp and crackling. The filling should be hot throughout; if you insert a knife into the center, it should come out hot to the touch.

The internal temperature of the egg-based wash should reach 160°F (71°C) to ensure food safety. Let it rest for 10 minutes before slicing—this allows the layers to set and makes cutting easier. The top should feel firm and shatter when you cut into it.

• Egg dishes: 160°F (71°C) in the thickest part