I've done a cobbler with frozen fruit, a box of yellow cake mix, and a diet sprite poured over the top. It was OK but not something I'd bring to a party or serve to guests. I've also made a Coca-Cola cake before, but it had all the fattening stuff in it, too. I will try this for sure tho!
You can make a
cake with vinegar for leavening instead of eggs for those with egg allergies or vegans.