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Fighting 'Fat Bloom' Can Mean A Prettier Look For Old Valentine's Day Chocolates

Date:
February 24, 2008
Source:
American Chemical Society
Summary:
Chemists in England and the Netherlands have discovered a substance that could keep those boxes of Valentine's Day chocolates, and other goodies, looking fresher and tastier. Their finding prevents formation of unsightly white films on the outside of chocolate. Called "fat bloom," white films are actually tiny particles of crystalline fat and most often appear on the surface of chocolates that contain nut-based fillings.

Chocolate with "fat bloom" (left) sits next to normal chocolate. Researchers have found a way to prevent this powdery white coating.
Credit: Courtesy of Loders Croklaan BV, The Netherlands

Chemists in England and the Netherlands have discovered a substance that could keep those boxes of Valentine's Day chocolates, and other goodies, looking fresher and tastier. Their finding prevents formation of unsightly white films on the outside of chocolate.

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Called "fat bloom," white films are actually tiny particles of crystalline fat and most often appear on the surface of chocolates that contain nut-based fillings. The films often alarm consumers, who may mistakenly think good chocolates have gone bad. Although the blooms have been studied for decades, the phenomenon is poorly understood and researchers have had difficulty finding an effective method to reduce their formation.

In the new study, Kevin W. Smith and colleagues crafted a candy-size mechanical model of a chocolate bon-bon using a series of stacked, steel washers. They layered the bottom of each cylinder with different concentrations of a substance called "antibloom fat" and then filled the top of each cylinder with cocoa butter to represent a chocolate coating. The scientists showed that increasing the amount of "antibloom" used in the filling slowed the rate of crystal formation, thereby preventing fat bloom.

The study "Effect of Antibloom Fat Migration from a Nut Oil Filling on the Polymorphic Transformation of Cocoa Butter" , is scheduled for the March 12 issue of the ACS' Journal of Agricultural and Food Chemistry.


Story Source:

The above story is based on materials provided by American Chemical Society. Note: Materials may be edited for content and length.


Cite This Page:

American Chemical Society. "Fighting 'Fat Bloom' Can Mean A Prettier Look For Old Valentine's Day Chocolates." ScienceDaily. ScienceDaily, 24 February 2008. <www.sciencedaily.com/releases/2008/02/080218134657.htm>.
American Chemical Society. (2008, February 24). Fighting 'Fat Bloom' Can Mean A Prettier Look For Old Valentine's Day Chocolates. ScienceDaily. Retrieved November 26, 2014 from www.sciencedaily.com/releases/2008/02/080218134657.htm
American Chemical Society. "Fighting 'Fat Bloom' Can Mean A Prettier Look For Old Valentine's Day Chocolates." ScienceDaily. www.sciencedaily.com/releases/2008/02/080218134657.htm (accessed November 26, 2014).

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