Preheat oven to 375°F (190°C). Line a baking sheet with parchment.

Toss diced apples with flour, brown sugar, and cinnamon. Stir so apples are coated.

Unroll crescent dough and separate into triangles. Spoon about 1-2 tbsp apple mix near wide end.

Drizzle a little melted butter over apples, then roll from wide end to point. Place seam-side down.

Bake 12–14 minutes until golden brown. Cool 5 minutes, dust with powdered sugar if using, and serve warm.