Cinnamon Apple Chips -1/4 cup confectioners’ sugar, 2 teaspoons ground cinnamon and 2 large apples. oven at 250°. Combine sugar and cinnamon, thinly slice two apples, (mandolin is useful) single layer on baking sheets; sprinkle with the cinnamon sugar. Bake apple slices, turn every 30 min, until dry, about 2 hours. Remove and transfer to racks to cool!