A major quality issue for the shelf life of chocolate products is the
formation of fat bloom. Bloomed chocolate has an unappealing, dulled,
whitish appearance. Many factors can promote bloom formation on
chocolate, such as fluctuating or improper storage temperatures, oil
migration from a filling to a chocolate coating, or insufficient tempering.
Consequently, bloom on chocolate can be difficult to control. The
best method for prevention is to properly temper chocolate. Tempering
is the process of pre-crystallizing cocoa butter to seed chocolate
with the proper number, size and polymorphic form of cocoa butter
crystals