Chocolate bloom is either of two types of whitish coating that can appear on the surface of chocolate: fat bloom, caused by changes in the fat crystals in the chocolate; and sugar bloom, due to crystals formed by the action of moisture on the sugar. Fat and sugar bloom damage the appearance of chocolate but do not limit its shelf life. Chocolate that has "bloomed" is still safe to eat (as it is a non-perishable food due to its sugar content), but may have an unappetizing appearance and surface texture. [1] Chocolate bloom can be repaired by melting the chocolate down, stirring it, then pouring it into a mould and allowing it to cool and re-solidify, bringing the sugar or fat back into the solution.
Fat bloom is the separation of the cocoa butter from the other components. [2] [3] Generally bloom arises from storage or age. Improper formulation exacerbates the problem. Lower melting point triglycerides in cocoa butter are more mobile than other constituents and migrate to the surface of the chocolate item. [4] [5]
Cocoa butter can be classified into polymorphic forms. Bloomed chocolates contain the most stable VI polymorph of cocoa butter. Bloom occurs through the uncontrolled polymorphic transformation of cocoa butter from a less stable form (form IV or V) to the most stable form (form VI). The technology of good chocolate production depends on ensuring that only the stable form of the cocoa butter ingredient exists in the final product. In poorly tempered chocolate, form IV will transform to V and eventually form VI, resulting in bloom, while in well-tempered chocolate, form V will transform to form VI and bloom may also occur. Elevated and/or fluctuating temperatures promote the transformation rate and thus also promote the rate of bloom formation. However, it is found that the production of form VI from form V does not always lead to bloom; a direct relationship cannot be established between fat bloom and the evolution of the crystalline forms. The onset of transformation from form V to form VI crystals is not the cause of visual bloom; rather, this transition should be considered as an aspect of cocoa butter recrystallization that may result in bloom. [4]
While the most common is fat bloom, sugar bloom also occurs and is not necessarily distinguishable from the fat bloom by appearance. In freshly sugar bloomed samples, it is often easy to feel the surface difference; sugar bloom feels dry and does not melt to the touch, while fat bloom feels slick and melts. One can often see the difference by touching a small droplet of water to the surface. With fat bloom, the droplet simply beads up. With sugar bloom, the droplet quickly flattens and spreads, as the water dissolves the microscopic sugar particles on the surface. Alternatively, gentle warming of the surface (with a hairdryer, for example) will cause the crystals of fat bloom to melt, removing the appearance of bloom, while leaving sugar bloom unchanged. [6]
Sugar bloom is caused by moisture. Condensation on to the surface of the chocolate or moisture in the chocolate coating causes the sugar to absorb the moisture and dissolve. When the moisture evaporates, the sugar forms larger crystals, leaving a dusty layer. It is caused by:
Sugar bloom can be reduced by maintaining an appropriate storage temperature for chocolate products. A psychrometric chart can be used to determine the temperature above which food must be maintained in order to avoid condensation. [8]
Chocolate is a food made from roasted and ground cocoa beans that can be a liquid, solid, or paste, either on its own or as a flavoring in other foods. The cacao tree has been used as a source of food for at least 5,300 years, starting with the Mayo-Chinchipe culture in what is present-day Ecuador. Later, Mesoamerican civilizations consumed cacao beverages, of which one, chocolate, was introduced to Europe in the 16th century.
Nutella is a brand of brown, sweetened hazelnut cocoa spread. Nutella is manufactured by the Italian company Ferrero and was introduced in 1964, although its first iteration dates to 1963.
Confectionery is the art of making confections, or sweet foods. Confections are items that are rich in sugar and carbohydrates although exact definitions are difficult. In general, however, confections are divided into two broad and somewhat overlapping categories: bakers' confections and sugar confections.
Candy, alternatively called sweets or lollies, is a confection that features sugar as a principal ingredient. The category, also called sugar confectionery, encompasses any sweet confection, including chocolate, chewing gum, and sugar candy. Vegetables, fruit, or nuts which have been glazed and coated with sugar are said to be candied.
A chocolate bar is a confection containing chocolate, which may also contain layerings or mixtures that include nuts, fruit, caramel, nougat, and wafers. A flat, easily breakable, chocolate bar is also called a tablet. In some varieties of English and food labeling standards, the term chocolate bar is reserved for bars of solid chocolate, with candy bar used for products with additional ingredients.
A croissant is a French pastry made from puff pastry in a crescent shape.
Cocoa butter, also called theobroma oil, is a pale-yellow, edible fat extracted from the cocoa bean. It is used to make chocolate, as well as some ointments, toiletries, and pharmaceuticals. Cocoa butter has a cocoa flavor and aroma. Its melting point is slightly below human body temperature. It is an essential ingredient of chocolate and related confectionary products. Cocoa butter does not contain butter or other animal products; it is vegan.
Conching is a process used in the manufacture of chocolate whereby a surface scraping mixer and agitator, known as a conche, evenly distributes cocoa butter within chocolate and may act as a "polisher" of the particles. It also promotes flavor development through frictional heat, release of volatiles and acids, and oxidation. The name arises from the shape of the vessels initially used which resembled conch shells.
White chocolate is a form of chocolate made of cocoa butter, sugar and milk. Unlike milk and dark chocolate, it does not contain cocoa solids. Among some members of the public, it is controversial whether white chocolate should be called chocolate and it only became recognized as chocolate in the United States during the 21st century. It is made by a process of mixing, refining, conching, standardizing and tempering.
Sugar candy is any candy whose primary ingredient is sugar. The main types of sugar candies are hard candies, fondants, caramels, jellies, and nougats. In British English, this broad category of sugar candies is called sweets, and the name candy or sugar-candy is used only for hard candies that are nearly solid sugar.
Maltesers are a British confectionery product manufactured by Mars Inc. First sold in the UK in 1937, they were originally aimed at women. They have since been sold in Europe, Australia, New Zealand, Canada, United States and Middle East. The slogan is "The lighter way to enjoy chocolate".
Puppy chow, also known as monkey munch, muddy buddies, muddy munch, reindeer chow, or doggy bag, is the name for a homemade candy made in the United States, primarily in the Midwestern States. The recipe's name and ingredients can differ depending on the version, but most recipes will typically include cereal, melted chocolate, peanut butter, and powdered sugar. Nut free versions can be made using nut butter alternatives, like Notnuts or sun butter. Corn, wheat, or rice cereal can be used, usually Chex and/or Crispix. The true origins of the candy are not known.
Polyglycerol polyricinoleate (PGPR), E476, is an emulsifier made from glycerol and fatty acids. In chocolate, compound chocolate and similar coatings, PGPR is mainly used with another substance like lecithin to reduce viscosity. It is used at low levels, and works by decreasing the friction between the solid particles in molten chocolate, reducing the yield stress so that it flows more easily, approaching the behaviour of a Newtonian fluid. It can also be used as an emulsifier in spreads and in salad dressings, or to improve the texture of baked goods. It is made up of a short chain of glycerol molecules connected by ether bonds, with ricinoleic acid side chains connected by ester bonds.
Chocolate is a food made from roasted and ground cocoa beans mixed with fat and powdered sugar to produce a solid confectionery. There are several types of chocolate, classified primarily according to the proportion of cocoa and fat content used in a particular formulation.
The following outline is provided as an overview of and topical guide to chocolate:
Ganache is a glaze, icing, sauce, or filling for pastries, made from chocolate and cream.
An enrober is a machine used in the confectionery industry to coat a food item with a coating medium, typically chocolate. Foods that are coated by enrobers include nuts, ice cream, toffee, chocolate bars, biscuits and cookies. Enrobing with chocolate extends a confection's shelf life.
Coating is a process that consists of applying a liquid or a powder into the surface of an edible product to convey new properties. Coating designates an operation as much as the result of it: the application of a layer and the layer itself. Coating takes different meanings depending on the industry concerned.
Tempering is a technique applied in chocolate production to create chocolate that is glossy, has a good snap and is more resistant to chocolate bloom. It involves cooling liquid chocolate while agitating it until a small amount of cocoa butter crystallizes. The liquid is then heated to maintain only the most stable crystal forms, which serve as nuclei for the rest of the cocoa butter to solidify around.
In polymer chemistry, materials science, and food science, bloom refers to the migration of one component of a solid mixture to the surface of an article. The process is an example of phase separation or phase aggregation.