Flaky apple strudel with layers of thin, crispy pastry wrapped around spiced apples is an Austrian-American family dessert classic. This elegant, aromatic pastry is perfect with a dusting of powdered sugar.
Preheat oven to 375°F. Line a baking sheet with parchment paper for even heat and easy cleanup.
Toss sliced apples with lemon juice, granulated sugar, ground cinnamon, and salt to coat well and prevent browning.
Lay one phyllo sheet on a clean towel, brush with melted butter, and sprinkle a little of the breadcrumbs. Layer remaining sheets, repeating butter and breadcrumb process.
Spoon the apple mixture along one short edge of the phyllo stack, leaving about 2 inches at the margins. Sprinkle raisins evenly atop the apples.
Carefully roll up the strudel, tucking in edges, and place seam-side down on the prepared baking sheet. Brush the top with remaining butter.
Bake for 40–45 minutes until golden and crisp, monitoring after 35 minutes to avoid overbaking. Cool slightly, dust with powdered sugar, and slice before serving.