• chocolate cake over cherry pie filling
• spice cake over peaches 
• spice cake over apples

To make your cake, use packaged cake mix and either canned or fresh sweetened fruit or canned pie filling.  Begin by putting the fruit in the bottom of the Dutch oven and sprinkle the dry cake mix over the top of the fruit. Pour enough 7up (or other lemon lime soda) over the top to moisten the mix a little [about 1/2 can] and poke it around some to begin.  Six coals on the bottom and twelve on top should be about right to cook this in  45 minutes or so.  As it begins to cook, you will see the moisture begin to come up through the cake mix.  If you end up with some dry spots add a little more 7up. You will end up with more of a cobbler than a cake, but very few leftovers.  Any time you cook sugar it will probably stick to your Dutch oven.  Foil lining the oven will somewhat prevent this, but the foil is more trouble than good, so to clean your oven after cooking anything sticky,  just boil it out.