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Golden, flaky sourdough pop tarts bring the kind of bakery-style crunch that makes you pause after the first bite. The crust bakes up crisp at the edges and tender in the middle, with a tang from the sourdough discard that keeps the sweetness from feeling flat. The Nutella filling melts into the seams, the toasted hazelnuts stay pleasantly crunchy, and the vanilla glaze sets into a thin, glossy finish that cracks just slightly when you bite through it.

The part that makes these work is the cold dough. Sourdough discard gives the pastry a little character, but the butter has to stay in distinct pieces so the crust bakes into layers instead of turning dense. Chilling the assembled tarts before they go into the oven matters just as much as the mixing stage, because that extra rest keeps the edges cleaner and helps prevent the filling from leaking out before the pastry has a chance to set.

Below, I’m walking through the details that matter most: how to keep the crust flaky, how to fill them without overstuffing, and the one finishing move that makes them look bakery-made instead of homemade in a hurry.

The Cold Butter Trick That Keeps These Sourdough Pop Tarts Flaky

The difference between a crisp, layered pop tart and a heavy one comes down to temperature. Cold butter needs to stay in little pockets inside the dough, because those pockets melt in the oven and leave behind the flaky layers everyone wants. If the butter softens while you’re mixing or rolling, the pastry starts acting like pie dough that’s been worked too much: tighter, tougher, and less crisp.

The sourdough discard adds flavor and a little tenderness, but it also brings moisture, so the dough needs a short chill before it gets rolled out. That rest gives the flour time to hydrate and makes the dough easier to handle. If it feels sticky right after mixing, resist the urge to keep adding flour. Chill it first. Most of the time, that fixes the problem without drying out the pastry.

• Sourdough starter discard — This brings the tang that keeps the pastry from tasting one-note. It doesn’t replace the butter or the flour structure, so use discard that’s unfed and pourable, not stiff dough starter.
• Cold butter — This is the engine of the flaky texture. Cubes that stay visible in the dough are what you want. If your butter is getting soft, pop the bowl in the fridge for 10 minutes before rolling.
• Nutella — The filling needs something smooth enough to spread but thick enough to stay inside the pastry. Straight Nutella works well because it firms up again as it bakes. If you warm it, use just enough to loosen it, not enough to make it runny.
• Toasted hazelnuts — These matter more than they look like they should. The crunch cuts through the soft filling and makes the middle taste layered instead of just sweet. If you skip them, the tart loses the texture contrast that makes it special.
• Flaky sea salt — Use the good finishing salt here. It doesn’t just add saltiness; it sharpens the chocolate and hazelnut flavor and keeps the glaze from tasting too sugary.

Rolling, Filling, and Sealing Before the Filling Has a Chance to Escape

Building the dough

Mix the flour, salt, and sugar first so everything is evenly distributed before the butter goes in. Cut the butter into the flour until you still see small pieces, some pea-sized and some a little larger. Add the sourdough starter and cold water just until the dough comes together. If you work it until it looks perfectly smooth, you’ve already gone too far and the baked crust will lose its layers.

Resting and rolling

Chill the dough for at least 30 minutes before rolling. That rest keeps the butter firm and gives the discard time to settle into the dough. Roll it on a lightly floured surface to an even thickness so the tops and bottoms bake at the same rate. If the dough starts shrinking back, it needs a few more minutes in the fridge, not more force from the rolling pin.

Filling without overstuffing

Cut clean rectangles and leave enough border around the edges to crimp properly. Spoon a modest amount of Nutella onto each base, then sprinkle on the crushed hazelnuts. Too much filling is the fastest way to get blowouts in the oven, especially with a pastry this tender. The goal is a visible seam of filling at the edge, not a pastry that looks stuffed to the point of bursting.

Crimping and baking

Press the edges together firmly with a fork so the seal holds while the butter melts. Before the pan goes into the oven, chill the assembled tarts again if you have time; cold pastry bakes up cleaner and flakier. Bake at 375°F until the tops are golden and the edges look set. If the tops are pale, they need a few more minutes, but don’t wait for deep browning or the filling will start to dry out.

The glaze and finish

Let the pop tarts cool for about 10 minutes before glazing so the icing clings instead of melting off. Dip the tops into the vanilla glaze, then finish with flaky salt and extra hazelnuts before the glaze sets. That timing matters. If you wait too long, the glaze turns dull and the toppings won’t stick.

How to Adapt These Sourdough Pop Tarts Without Losing the Good Parts

Answers to the Questions Worth Asking

Sourdough Pop Tarts

Sourdough pop tarts with a golden, flaky crust and a Nutella–hazelnut filling peek out at the crimped seam. Dip the baked pastries in vanilla glaze, then finish with flaky sea salt and extra crushed hazelnuts for a sweet-salty crunch.

Print Recipe Pin Recipe

Prep Time 55 minutes mins

Cook Time 22 minutes mins

Chill 30 minutes mins

Total Time 1 hour hr 47 minutes mins

Servings: 6 servings

Course: Breakfast, Dessert

Cuisine: American

Calories: 330

Ingredients Equipment Method Notes

Ingredients

  

Sourdough crust

• 1 cup sourdough starter (discard) Use active discard straight from the fridge.
• 2 all-purpose flour
• 1 tsp salt
• 1 tbsp sugar
• 0.5 cup cold butter, cubed Keep very cold for the flakiest layers.
• 3.5 tbsp cold water Add only as needed to bring the dough together.

Nutella–hazelnut filling

• 0.5 cup Nutella
• 0.25 cup crushed toasted hazelnuts Crush toasted hazelnuts for extra crunch.

Vanilla glaze

• 1 cup powdered sugar
• 2 tbsp milk
• 1 tsp vanilla

Topping

• 1 flaky sea salt Use sparingly so you can still taste the pastry.
• 1 extra crushed hazelnuts Sprinkle right after glazing for best texture.

Equipment

• 1 sheet pan

Method

 

Make and chill the dough

1. In a mixing bowl, combine all-purpose flour, salt, and sugar, then cut in cold butter cubes until the mixture looks pebbly. Add sourdough starter (discard) and cold water and stir just until the dough comes together.
2. Press the dough into a disk, wrap, and chill for 30 min in the refrigerator. Keep the dough cold for crisp, flaky layers when baked.

Shape the pop tarts

1. On a lightly floured surface, roll the chilled dough and cut it into rectangles. Keep scraps covered while you work so the dough stays cold.
2. Spoon Nutella and crushed toasted hazelnuts onto the center of half the rectangles, leaving a border around the edges. Aim for a visible filling layer so you get a dark seam at crimping.
3. Place the remaining rectangles on top and crimp the edges firmly with your fingers. Seal well to prevent filling from leaking during baking.

Bake

1. Arrange the pastries on a sheet pan and bake at 375°F for 20–22 min until golden. Look for deep browning at the crimped edges and set centers.

Glaze and finish

1. Let the pastries cool for 10 min, then dip the tops in vanilla glaze. Allow excess glaze to drip back onto the pastries before topping.
2. Sprinkle flaky sea salt and extra crushed hazelnuts over the glazed tops right away. Finish immediately so the crunchy topping adheres before the glaze sets.

Notes

For the flakiest sourdough crust, chill the dough before rolling and again keep it cool between cutting and filling. Store baked pop tarts in an airtight container in the fridge for up to 4 days; warm briefly to re-crisp. Freeze baked (unglazed is best) up to 2 months, then thaw and glaze. For a dairy-free option, use a plant-based butter and swap milk with oat or almond milk in the glaze.