Yes on the WB. I like #3 best, would like to see it with WB corrected.
They seem to be missing "pop." A little dark? Needs a little more contrast? Don't know, experiment.
One other comment that is as much marketing as photography. What is the purpose of the pics? A menu? Flyer? Advertisement? If so, you (your friend) might want to reconsider the concept altogether.
The squiggly designs are nice, artsy and all, but if I was looking at an advertisement or a menu and I saw a desert that had a pic of one tiny waffle the size of a strawberry I wouldn't waste my time. The entire desert would be gone in one tablespoon-full.
If your friend serves the desserts with a plate full of tiny waffles, then show that. Make the photography not only good technically, but good in the sense it communicates a good value.
Because if I spend five bucks for a desert, I expect more than a single bite... artsy-fartsy chocolate drizzle designs or not.