Vanilla is an aromatic flavouring substance derived from the vanilla orchids. The name came from the Spanish word “vainilla”, meaning “little pod”.
Vanilla Plant
The vanilla plant is a vine with short, oblong, dark green leaves. The flowers are quite large and beautiful with white, green, greenish, yellow or cream colors. The life of the flower is almost as brief as a firefly’s unless the plant is fertilised early in the morning. Vanilla flowers carry both male (anther) and female (stigma) organs separated by a membrane. The flowers are pollinated by stingless bees, Melipona, which come primarily for the nectar. The fruit is an elongate, fleshy seed pod between 10-20 cm long. When immature, the bean is dark green in colour and starts yellowing when it is ripe. Ripe vanilla will be harvested and cured to encourage the vanillin to be developed by enzyme action on the glucosides in the beans.
The vanilla plant is native to Mexico. It is now widely grown throughout the tropics in the Indian Ocean and French Polynesia. The top vanilla producers are Madagascar, Indonesia, Mexico, Comoros, Tonga and Tahiti.
In London, you can see the vanilla plant in the Royal Botanical Gardens, Kew. Every year, the vanilla plants in the Palm House flowers and the gardeners will hand-pollinate the flowers to produce pods. They also offer desserts using their own vanilla beans.
History
Vanilla was discovered by Hernando Cortes in the 1500s in Mesoamerica. In 1703, Father Plumier baptised this plant and gave it the name Vanilla. The Spanish were the first to import vanilla plants into Europe. The plants were infertile after they arrived in Europe because of the absence of Melipona bees.
In 1848, a 12 year-old slave in Réunion (a French island just east of Madagascar), Edmond Albius, stumbled upon a way to fertilise the flower. Using a bevelled sliver of bamboo to fold back the membrane separating the anther and the sigma, one presses the anther onto the stigma - the flower is then self-pollinated and will produce a fruit. This simple and efficient method is still being used until this day.
Stages of Production
Harvest: The beans are harvested green and immature. At this stage they are odorless
Wilting: The vegetative tissue of the vanilla pod is killed to prevent it from growing further after being harvested. There are various methods of wilting: sun, oven, hot water, scratching or freezing
Sweating: The beans are then held for 7 to 10 days under humid and high (45°C - 65°C) temperature conditions. This will promote the desired enzymatic reactions and to prevent fermentations. The vanilla aroma becomes perceptible in this stage
Drying: The beans are dried slowly in the shade until they reach about one-third of their original weight
Conditioning: The beans are stored in closed boxes for three months or longer to permit the full development of the desired aroma and flavour
Grading: When fully cured the vanilla is sorted by quality and grade