I've been playing around with the idea of customizable food in my brain (BRAINS!) and already found a few already-implemented business ideas to observe.
The first I found on the intertubes via some links in my Daily Candy NYC newsletter (I think). It drove me to this: Chocri
And it's not just normal old chocolate ideas. They have things like dried apples and bananas to coriander and chives to nuts, gummy bears, and "rice crispies." You can choose any type of chocolate (milk, dark, white, and a mix of milk and white). And voila! You have your own chocolate bar. It's a little pricey ($6.50 for the base 3.5 oz chocolate bar plus toppings), but what do you expect for customizable chocolate bars! YUMMMM.
The second thing I came across was while I was watching a new show on Food Network called "Kid in a Candy Store," which is essentially the televised travels of a really lucky guy who gets to go to all the unique dessert locales in the country, and came across the most genius idea: customizable ice cream.
Using science, they allow you to make your own types of ice cream based on their flavors, mix-ins, and even food coloring options. They make it all right in front of you with an every-day standing mixer and a blast of nitrogen. On cold days - hey, it IS Chicago - they you can also make your flavor of pudding that they boil on the spot with an espresso machine milk steamer. Pretty awesome, no?
And, I just found out from an awesome friend that there is a place in NYC that also does this called Lulu and Mooky's: http://www.yelp.com/biz/lulu-and-mookys-liquid-nitrogen-ice-cream-new-york
Must go check it out!!!