Rinse and dice the apples into small cubes. Add the butter to a pan on medium heat.
Pour in the apples and cook until tender, 5-7 minutes. Add the brown sugar, vanilla, cinnamon and cornstarch or flour, then continue to cook on a medium-low heat until the apples are very fork tender and the mixture becomes thick, approximately another 5-6 minutes. Set aside.
Lay out the crescent dough and separate into triangles.
Fill one corner of the pastry with the apple filling, then roll until the dough meets the other edge, sealing the sides closed with your fingertips.
Brush egg wash on top, then bake at 350º for 14-15 minutes. Let cool, then dust with powdered sugar and serve.
Notes
Dice the apples Slice them thin then dice them into smaller cubes so they aren’t super clunky and chunky when rolled into the dough.Don’t overfill: A small spoonful of apple filling is just the right amount to keep the rolls from bursting open or seeping out of the sides.Seam side down: When placing the crescent rolls onto the baking sheet, place the seam side down so that it prevents the roll from opening.Dust after baking: Let the rolls cool slightly before sprinkling powdered sugar so it doesn’t melt right away.