- Place apples in a large bowl. Stir in brown sugar and golden raisins; set aside. Place puff pastry on baking sheet. Roll lightly with a rolling pin. Arrange apple filling down the middle of the pastry lengthwise. Fold the pastry lengthwise around the mixture. Seal edges of pastry by using a bit of water on your fingers, and rubbing the pastry edges together. Whisk egg and milk together, and brush onto top of pastry.