Chocolate is a typically sweet, usually brown, food preparation of Theobroma cacao seeds, roasted and ground, often flavored, as with vanilla. It is made in the form of a liquid, paste, or in a block, or used as a flavoring ingredient in other foods. Cacao has been cultivated by many cultures for at least three millennia in Mesoamerica. The earliest evidence of use traces to the Mokaya (Mexico and Guatemala), with evidence of chocolate beverages dating back to 1900 BC. In fact, the majority of Mesoamerican people made chocolate beverages, including the Maya and Aztecs,[2] who made it into a beverage known as xocolātl, a Nahuatl word meaning “bitter water”. The seeds of the cacao tree have an intense bitter taste and must be fermented to develop the flavor.

After fermentation, the beans are dried, cleaned, and roasted. The shell is removed to produce cacao nibs, which are then ground to cocoa mass, pure chocolate in rough form. Because the cocoa mass is usually liquefied before being molded with or without other ingredients, it is called chocolate liquor. The liquor also may be processed into two components: cocoa solids and cocoa butter. Unsweetened baking chocolate (bitter chocolate) contains primarily cocoa solids and cocoa butter in varying proportions. Much of the chocolate consumed today is in the form of sweet chocolate, a combination of cocoa solids, cocoa butter or other fat, and sugar. Milk chocolate is sweet chocolate that additionally contains milk powder or condensed milk. White chocolate contains cocoa butter, sugar, and milk, but no cocoa solids.

Cocoa solids are a source of flavonoids and alkaloids, such as theobromine, phenethylamine and caffeine.

Chocolate has become one of the most popular food types and flavors in the world, and a vast number of foodstuffs involving chocolate have been created. Gifts of chocolate molded into different shapes have become traditional on certain holidays. Chocolate is also used in cold and hot beverages such as chocolate milk and hot chocolate.

Although cocoa originated in the Americas, today Western Africa produces almost two-thirds of the world’s cocoa, with Ivory Coast growing almost half of it.

The word “chocolate” entered the English language from Spanish. How the word came into Spanish is less certain, and there are competing explanations. Perhaps the most cited explanation is that “chocolate” comes from Nahuatl, the language of the Aztecs, from the word chocolātl, which many sources say derived from xocolātl , combining xococ, sour or bitter, and ātl, water or drink. The word “chocolatl” does not occur in central Mexican colonial sources, making this an unlikely derivation. Another derivation comes from the Yucatec Mayan word chokol meaning hot, and the Nahuatl atl meaning water. The Nahuatl term, chicolatl, meaning “beaten drink”, may derive from the word for the frothing stick, chicoli.

Mesoamerican usage

Chocolate has been prepared as a drink for nearly all of its history. For example, one vessel found at an Olmec archaeological site on the Gulf Coast of Veracruz, Mexico, dates chocolate’s preparation by pre-Olmec peoples as early as 1750 BC. On the Pacific coast of Chiapas, Mexico, a Mokaya archaeological site provides evidence of cacao beverages dating even earlier, to 1900 BC. The residues and the kind of vessel in which they were found indicate the initial use of cacao was not simply as a beverage, but the white pulp around the cacao beans was likely used as a source of fermentable sugars for an alcoholic drink.
Aztec. Man Carrying a Cacao Pod, 1440–1521. Volcanic stone, traces of red pigment. Brooklyn Museum
An early Classic-period (460–480 AD) Mayan tomb from the site in Rio Azul had vessels with the Maya glyph for cacao on them with residue of a chocolate drink, suggests the Maya were drinking chocolate around 400 AD. Documents in Maya hieroglyphs stated chocolate was used for ceremonial purposes, in addition to everyday life. The Maya grew cacao trees in their backyards, and used the cacao seeds the trees produced to make a frothy, bitter drink.

By the 15th century, the Aztecs gained control of a large part of Mesoamerica and adopted cacao into their culture. They associated chocolate with Quetzalcoatl, who, according to one legend, was cast away by the other gods for sharing chocolate with humans, and identified its extrication from the pod with the removal of the human heart in sacrifice. In contrast to the Maya, who liked their chocolate warm, the Aztecs drank it cold, seasoning it with a broad variety of additives, including the petals of the Cymbopetalum penduliflorum tree, chile pepper, allspice, vanilla, and honey.

The Aztecs were not able to grow cacao themselves, as their home in the Mexican highlands was unsuitable for it, so chocolate was a luxury imported into the empire. Those who lived in areas ruled by the Aztecs were required to offer cacao seeds in payment of the tax they deemed “tribute”. Cocoa beans were often used as currency. For example, the Aztecs used a system in which one turkey cost 100 cacao beans and one fresh avocado was worth three beans.