South Tyrol, Trentino-Alto Adige — the region where Austria and Italy meet. Strudel came to the South Tyrol via the Austrian Empire's control of the area from 1814-1919. The apple variety of the Adige Valley (apple is the principal fruit crop of the region) is the defining filling ingredient.
Apple strudel in the South Tyrol is both the defining pastry of the Austrian-influenced north and a dish with technical requirements quite different from commercial versions: the strudel dough must be stretched by hand to near-transparency over a cloth-covered table, filled with a spiced apple-raisin mixture, rolled, and baked until the dough is crisp and shatteringly thin in places but tender at the fold. It is not a shortcut dessert — the hand-stretching of the dough is the technique.
The hand-stretched strudel dough bakes into alternating crisp and tender layers — shatteringly thin where it was stretched thinnest, slightly thicker and softer where it overlapped. The apple filling, spiced with cinnamon and brightened with lemon, cooks to a yielding sweetness inside. The contrast between crisp pastry and tender filling is the pleasure.
Strudel dough: 300g strong flour (high gluten), 1 egg, warm water, a teaspoon of white wine vinegar, a tablespoon of neutral oil — mixed to a smooth, elastic dough, rested warm (wrapped, near the oven) for 30 minutes. The gluten must fully relax before stretching. Stretching: work on a cloth-covered table dusted with flour. Using the backs of both hands, stretch the dough from the centre outward until it is paper-thin (transparent in the thinnest areas) — roughly 60cm × 80cm for a standard recipe. The filling: thinly sliced apples (Golden Delicious or similar — not too juicy), soaked raisins, toasted breadcrumbs fried in butter (to absorb apple juice), sugar, cinnamon, and lemon zest. Scatter filling over ¾ of the dough, fold the sides in, and roll using the cloth.
The breadcrumbs fried in butter until golden are essential — they absorb the apple juice during baking and prevent the bottom from becoming soggy. Brush the stretched dough generously with melted butter before adding the filling — this is what creates the flaky layers. Bake at 200°C until deep golden — a pale strudel is under-baked. Serve with Schlagobers (whipped cream) or vanilla sauce.
Not resting the dough sufficiently — it resists stretching and tears. Stretching from the edges rather than the centre — tears at the thinnest points. Filling too wet — the strudel becomes soggy; the breadcrumbs are the moisture absorber. Baking at too low a temperature — the dough steams rather than crisps.
Slow Food Editore, Trentino-Alto Adige in Cucina; Elisabeth Lambert Ortiz, The Encyclopedia of Herbs, Spices & Flavourings