At home: If you want to save yourself a little prep time at the campsite, mix up your cake batter in a large locking freezer bag. Otherwise, pack ingredients in individual containers.

On the trail: Slice the tops off the oranges about a half inch from the top, and be sure to save the tops to use later. Hollow out the oranges with a spoon, and enjoy some fresh orange slices while you bake. Mix the cake batter in a large locking plastic bag and then cut the corner of the bag and use the opening to squeeze batter into the hollowed oranges. Fill the oranges about ¾ full. Place the tops back on the oranges and wrap the fruit in foil. Place the oranges onto hot coals and let cook for 20-30 minutes. Unwrap and enjoy your cake!