Remove the cores of apples such that the apples are intact with a tube-like hole right through the center. Do not remove the skins of the apples. Mix the sugar, raisins   cinnamon together. Stuff this raisin mixture into the cored apples in the tube-like hole. Pack well and wrap each whole apple in aluminum foil. Throw into embers at campfire and let cook for 8-10 minutes. Remove foil wrapper and eat.