English researchers from the University of Warwick used a technique called the Pickering emulsion to replace up to half of the fat in chocolate with fruit juice.
Dr. Stefan Bon is the lead researcher for the fat-to-fruit-juice chocolate experiment. He states in the August 14, 2012 Daily Mail article Good news for chocaholics: Scientists replace fat with FRUIT JUICE to create healthy chocolate bars that, "Everyone loves chocolate — but unfortunately we all know that many chocolate bars are high in fat."
"However it's the fat that gives chocolate all the indulgent sensations that people crave — the silky smooth texture and the way it melts in the mouth but still has a 'snap' to it when you break it with your hand"
Bon adds, "We've found a way to maintain all of those things that make chocolate 'chocolatey' but with fruit juice instead of fat. Our study is just the starting point to healthier chocolate — we've established the chemistry behind this new technique but now we're hoping the food industry will take our method to make tasty, lower-fat chocolate bars."
They wrote up their results in the paper "Quiescent water-in-oil Pickering emulsions as a route toward healthier fruit juice infused chocolate confectionary" (DOI: 10.1039/C2JM34233B).
It appears in the Journal of Materials Chemistry, making its presence first on the Web on August 8, 2012.
The abstract to the paper states, "We demonstrate a route toward the preparation of healthier fruit juice infused chocolate candy. Up to 50 wt% of the fat content in chocolate, that is cocoa butter and milk fats, is replaced with fruit juice in the form of emulsion droplets using a quiescent Pickering emulsion fabrication strategy."
Preliminary findings state that the newly formulated chocolate tastes a little fruity, but still satisfies the desires of chocolate lovers. (I'll have to do my own taste test to be sure!)
The four authors of the study are: Thomas S. Skelhon, Nadia Grossiord, Adam R. Morgan, and Stefan A. F. Bon, all from the Department of Chemistry at the University of Warwick.