Chocolate bloom

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Comparison of blooming (left) and regular chocolate bars Fat bloom.jpg
Comparison of blooming (left) and regular chocolate bars
Bloom on chocolate filled with marzipan Marzipanosterei mit Fettreif.JPG
Bloom on chocolate filled with marzipan
Bloom on chocolate filled with marzipan viewed under optical microscope Fettreif.jpg
Bloom on chocolate filled with marzipan viewed under optical microscope

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, bringing the sugar or fat back into the solution.

Contents

Fat bloom

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]

Sugar bloom

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:

Method to minimize sugar bloom

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]

Related Research Articles

<span class="mw-page-title-main">Chocolate</span> Food produced from cacao seeds

Chocolate or cocoa is a food made from roasted and ground cacao seed kernels that is available as a liquid, solid, or paste, either on its own or as a flavoring agent in other foods. Cacao has been consumed in some form for at least 5,300 years starting with the Mayo-Chinchipe culture in what is present-day Ecuador and later Mesoamerican civilizations also consumed chocolate beverages before being introduced to Europe in the 16th century.

<span class="mw-page-title-main">Nutella</span> Chocolate and hazelnut flavored spread

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.

<span class="mw-page-title-main">Confectionery</span> Prepared foods rich in sugar and carbohydrates

Confectionery is the art of making confections, which are food items that are rich in sugar and carbohydrates. Exact definitions are difficult. In general, however, confectionery is divided into two broad and somewhat overlapping categories: bakers' confections and sugar confections. The occupation of confectioner encompasses the categories of cooking performed by both the French patissier and the confiseur.

<span class="mw-page-title-main">Candy</span> Sweet confection

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.

<span class="mw-page-title-main">Chocolate bar</span> Confection

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.

<span class="mw-page-title-main">Croissant</span> Flaky, crescent-shaped pastry

A croissant is a French pastry made from puff pastry in a crescent shape.

<span class="mw-page-title-main">Icing (food)</span> Food producing method

Icing, or frosting, is a sweet, often creamy glaze made of sugar with a liquid, such as water or milk, that is often enriched with ingredients like butter, egg whites, cream cheese, or flavorings. It is used to coat or decorate baked goods, such as cakes. When it is used between layers of cake it is known as a filling.

<span class="mw-page-title-main">Cocoa butter</span> Pale-yellow, edible fat extracted from the cocoa bean

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.

<span class="mw-page-title-main">Conching</span> Process in the manufacture of chocolate

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.

<span class="mw-page-title-main">White chocolate</span> Confectionery made from milk solids without cocoa solids

White chocolate is a confectionery typically made of sugar, milk, and cocoa butter, but no cocoa solids. It is pale ivory in color, and lacks many of the compounds found in milk, dark, and other chocolates. It is solid at room temperature because the melting point of cocoa butter, the only white cocoa bean component, is 35 °C (95 °F).

<span class="mw-page-title-main">Sugar candy</span> Candy primarily composed of sugar

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.

<span class="mw-page-title-main">Maltesers</span> Confectionery product made by Mars

Maltesers are a British confectionery product manufactured by Mars, Incorporated. 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".

<span class="mw-page-title-main">Puppy chow (snack)</span> Homemade candy made in the United States

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.

<span class="mw-page-title-main">Polyglycerol polyricinoleate</span> Emulsion used in food production

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.

Mango oil, mango kernel fat, or mango butter, is an oil fraction obtained during the processing of mango butter. Mango oil is a seed oil extracted from the stone of the mango, the fruit of the Mangifera indica tree. The oil is semi-solid at room temperatures, but melts on contact with warm skin, making it appealing for baby creams, suncare balms, hair products, and other moisturizing products. The oil is a soft yellow color with a melting point of 32–42 °C (90–108 °F).

<span class="mw-page-title-main">Types of chocolate</span> Classification of different chocolate types

Chocolate is a food product made from roasted and ground cocoa pods 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:

<span class="mw-page-title-main">Enrober</span> Machine to coat a food item

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.

<span class="mw-page-title-main">Food coating</span> Food manufacturing process

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.

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.

References

  1. Lonchampt, P.; Hartel, Richard W. (2004). "Fat bloom in chocolate and compound coatings". European Journal of Lipid Science and Technology. 106 (4): 241–274. doi:10.1002/ejlt.200400938.
  2. Kleinert-Zollinger, Jürg; Beckett, Stephen T. (2006). "Chocolate". Ullmann's Encyclopedia of Industrial Chemistry . Weinheim: Wiley-VCH. doi:10.1002/14356007.a07_023.pub2. ISBN   978-3527306732.
  3. Kinta, Yasuyoshi; Hatta, Tamao (2005). "Morphology of fat bloom in chocolate". Journal of the American Oil Chemists' Society. 82 (9): 685. doi:10.1007/s11746-005-1129-7.
  4. 1 2 McCarthy, J.; David, S.; Daijing, Wei (2003). "Fat Bloom in Chocolate" (PDF). The Manufacturing Confectioner: 89–93.
  5. Minifie, Bernard W. (1989). Chocolate, Cocoa and Confectionery. Springer. pp. 646–663. ISBN   9780834213012.
  6. Gillco, Team (2019-07-22). "WHAT IS CHOCOLATE BLOOMING?". Gillco Ingredients. Retrieved 2024-02-28.
  7. "What's That White Stuff on Your Chocolate Bar?". Cocoa Box | Chocolate Subscription Box & Gifts. 2021-01-21. Retrieved 2024-04-15.
  8. "Is this sugar bloom and how to prevent it?". TheChocolateLife. Retrieved 2024-02-28.

Further reading