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Cocoa Powder

Processing

General Info

The Cacao Tree (Theobroma Cacao) is grown in the tropics in a band between 10 to 20 degrees north and south of the equator, sometimes called the "Cocoa Belt". The tree is often grown in the shades of other trees. It can be as tall as 40 feet (12 meters), and has fruits (pods) which are more than on foot (30 cm) long. The fruits may be brownish-yellow to purple, and contain 20-40 seeds or cacao beans in a pink, sweet-sour pulp.

Fermentation of Cocoa Bean

The cacao fruits are opened and the pulp and seeds are transferred to larger containers. This is either performed by farmers, plantation workers, or in large cocoa factories where it can be done by machines.

The cacao beans are later transferred to wooden crates or baskets with banana leaves in between and on top to enable an optimal fermentation. The duration of the fermentation depends on the variety and is from 2 to more than 7 days. The length of the fermentation also affects the aroma, so if well-developed aroma is wanted the beans are fermentation for a longer time.

The fermentation process transforms the flavor to what we associate with cocoa and chocolate. Without the fermentation process there will not be any chocolate flavor.

 
 

Drying & Roasting of Cocoa Beans

When the fermentation is terminated the cacao beans are sun-dried. At this stage the smell of cocoa can be observed. In small plantations the fermented beans are spread by hand, and later turned over by hand or foot. In Central America the beans are dried on wooden floors which can be covered by a sliding roof if it starts to rain. On larger plantations electric dryers are used.
The drying process takes 1-2 weeks, and during that period the color changes from reddish brown to dark brown. The beans are then polished by a machine to obtain an improved visual appearance. Previously the beans were polished by "dancing the cacao beans"; the dancers polished the beans with their feet in a dance-like manner.

The cacao beans are then packed for domestic consumption or for export to cocoa and chocolate manufacturers.
The cacao beans are sometimes treated by alkali in a process called "Dutching.” This process removes some of the acidity of the beans and gives a smoother flavor and a darker color of the cocoa.

Before making cocoa and chocolate the beans are roasted to develop the final chocolate flavor. The temperature and time of roasting affects the flavor and color of the chocolate. Finally the shells are removed ("winnowed") from the roasted beans, and the beans are ready for making chocolate paste, cocoa, cocoa butter and chocolate.

Manufacturing Cocoa

High quality cocoa powder must be easily dissolved and have good flavor. The beans used for the manufacture of cocoa are selected especially for this purpose.

After roasting and winnowing (removing the outer shell from the cacao beans) they are ground making cocoa liquor. The heat which is generated melts the cocoa fat thus generating liquor, and sometimes additional heating is employed. The liquor hardens to unsweetened chocolate when it cools below 95°F/35°C

Pressure is employed to the cocoa liquid (while slightly heated) to remove some of the fat which is also called cocoa butter. The remaining cocoa solids contain 10-25% cocoa butter depending on brand. The solids are then ground to cocoa powder. Sometimes the cocoa is made alkaline by treatment with potassium carbonate; this is called Dutched cocoa. This gives a darker color and a stronger flavor. American recipes are usually made for natural cocoa powder, which has a higher acidity. Therefore baking soda may be used in recipes with natural cocoa. Baking soda should not be used with Dutched cocoa unless an acid ingredient is added, e.g. orange juice or sour cream. Cocoa used for cooking is normally unsweetened.

 
 
 
 
     
   
 
   
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