Wiener Apfelstrudel with Caramelized Apples, Rum-Soaked Raisins, Toasted Walnuts and Vanilla Sauce

Make the strudel dough: combine flour and salt in a bowl. Add warm water, oil, and vinegar. Mix with a fork until a rough dough forms, then turn onto an unfloured surface and knead for 10 minutes. This dough develops an unusually extensible gluten network through vigorous kneading — the goal is a dough that can be stretched paper-thin without tearing. Wrap in oiled plastic wrap and rest at room temperature for at least 30 minutes — resting is crucial and cannot be skipped.

Ingredients

• For the strudel dough (Strudelteig):
• 200g (1.75 cups) all-purpose flour (bread flour also works — slightly higher gluten helps stretch)
• 1 pinch of salt
• 120ml (1/2 cup) warm water
• 2 tbsp neutral oil (sunflower or vegetable — NOT olive oil)
• 1 tsp white wine vinegar (relaxes the gluten, making stretching easier)
• For the apple filling:
• 1 kg (2.2 lbs) tart apples — Granny Smith, Boskoop, or Braeburn; do NOT use sweet apples like Golden Delicious — they become mushy and lack the acidity that balances the sugar
• 80g (1/3 cup) granulated sugar
• 1 tsp ground cinnamon
• Pinch of ground cloves
• Zest of 1 lemon
• 100g (3.5 oz) raisins, soaked in 3 tbsp dark rum for at least 1 hour (or overnight) — they should be plump, fragrant with rum
• 80g (2.75 oz) walnuts, roughly chopped and toasted in a dry pan until golden
• For the breadcrumb layer (essential for preventing a soggy strudel):
• 60g (4 tbsp) unsalted butter
• 80g (1 cup) fine fresh breadcrumbs (from a day-old white loaf, not panko)
• For assembly and baking:
• 80g (5.5 tbsp) unsalted butter, melted — for brushing the dough
• Powdered sugar for dusting
• For the vanilla sauce (Vanillesauce):
• 500ml (2 cups) whole milk
• 1 vanilla bean, split and scraped (or 1.5 tsp pure vanilla extract)
• 5 egg yolks
• 100g (1/2 cup) sugar
• 1 tbsp cornstarch

Instructions

1. Make the strudel dough: combine flour and salt in a bowl. Add warm water, oil, and vinegar. Mix with a fork until a rough dough forms, then turn onto an unfloured surface and knead for 10 minutes. This dough develops an unusually extensible gluten network through vigorous kneading — the goal is a dough that can be stretched paper-thin without tearing. Wrap in oiled plastic wrap and rest at room temperature for at least 30 minutes — resting is crucial and cannot be skipped.
2. Prepare the apple filling: peel, core, and slice apples into 3mm half-moons — thin enough to soften during baking but thick enough to retain their shape. Toss with sugar, cinnamon, cloves, and lemon zest. Add the rum-soaked raisins and toasted walnuts. Do NOT mix ahead — the apples release juice rapidly once salted with sugar, which will make the dough soggy. Mix immediately before assembling.
3. Toast the breadcrumbs: melt butter in a wide pan over medium heat. Add fresh breadcrumbs and stir continuously for 5-7 minutes until deep golden brown and fragrant. Transfer immediately to a bowl and cool. The buttered breadcrumbs form a moisture barrier between the dough and the apple filling — without them, the juices saturate the thin dough and the strudel collapses.
4. Stretch the dough: cover a large table with a clean cloth or linen tablecloth and dust lightly with flour. Place the rested dough in the center. Using a rolling pin, roll it into a rough rectangle. Then — using the backs of your hands with fingers curled under (never your nails or fingertips, which will tear) — stretch the dough from the center outward in all directions. Walk around the table, lifting and gently pulling. The dough should become translucent — you should be able to read newsprint through it. Trim any thick edges with scissors. Work quickly before the dough dries.
5. Assemble: brush the stretched dough generously with melted butter. Scatter the toasted breadcrumbs over two-thirds of the dough closest to you, leaving a 5cm border on the edges and a clean 1/3 of dough on the far side. Pile the apple filling in a log shape along the near edge of the breadcrumbs.
6. Roll and bake: preheat to 190°C (375°F). Using the cloth underneath, lift the near edge of the dough over the filling. Then use the cloth to roll the strudel away from you in a single motion — the dough layers around the filling to create the characteristic spiral cross-section. Transfer to a parchment-lined baking sheet, seam-side down. Curve slightly into a crescent if needed to fit. Brush all surfaces generously with melted butter.
7. Bake for 35-40 minutes, brushing with melted butter again at the halfway point, until the strudel is deeply golden, glossy, and the dough sounds hollow when tapped. Cool for 15 minutes before slicing — the filling needs to settle.
8. Make the vanilla sauce: whisk egg yolks, sugar, and cornstarch until pale. Heat milk with vanilla bean in a saucepan until just below boiling. Pour hot milk slowly over the yolk mixture, whisking constantly. Return to the saucepan and cook over medium heat, stirring continuously, until the sauce coats the back of a spoon thickly. Do not boil. Strain.
9. Serve: dust sliced strudel generously with powdered sugar through a fine sieve. Pool warm vanilla sauce on each plate. Lay a slice of strudel against the sauce. The Wiener Apfelstrudel is the defining pastry of the Habsburg Empire — its technique, brought to Vienna from Ottoman-influenced Hungarian kitchens in the 17th century, requires a dough so thin it became the measure of a pastry cook's skill. Viennese pastry chefs say the dough must be thin enough to read a love letter through.