Bammy is a traditional Jamaican cassava flatbread descended from the simple flatbread called casabe, eaten by the Arawaks / Taínos, Jamaica's indigenous people. Variations of bammy exist throughout the Americas. It is produced in many rural communities and sold in stores and by street vendors in Jamaica and abroad.

Bammies have existed since pre-Columbian times, and they originated from the native Arawak / Taíno people. They are made with cassava (also called yuca or manioc) indigenous to Mesoamerica, and was a staple crop of the Arawaks / Taínos, which they cultivated in conucos. Cassava was also integral to their existence, as it featured prominently in their worship. Yúcahu, a major Taíno god, whose name has been translated to ‘spirit of the cassava’, was the god of cassava and the sea. A minor Taíno god related to growing cassava, the process of life, creation and death, Baibrama, was worshipped for his assistance in growing cassava and curing people from its poisonous juice.

According to the curator of the Jamaica National Heritage Trust, Ann-Marie Howard Brown, the Arawaks / Taínos used a small, sharp, flat stone (celt) to peel and cut the cassava, which they would then grate on a guaio / guayo, a wooden frame embedded with small stones and pieces of coral or a stone grater, until it was reduced to a pulp. They would then place the pulp in a large funnel-shaped basket called a matapi, which was hung from a tree for extraction of the juice. Once the desired consistency was achieved, the mixture was placed on a stone structure called a metate, and a smaller ground stone called a mano, was used like a modern rolling pin to grind to the consistency of cassava flour. This would then be moulded to circles in the desired size, and baked on earthenware griddles called buréns.

The Arawaks / Taínos passed on this tradition to the enslaved Africans, and some aspects of the original method of preparing bammy are still practised in parts of St Elizabeth and South East Manchester today.

For centuries, it was the bread staple for rural Jamaicans until the cheaper, imported wheat flour breads became popular in the post-World War II era.

In the 1990s, the United Nations and the Jamaican government established a program to revive bammy production and to market it as a modern, convenient food product.

Bammies are currently produced and sold in supermarkets across Jamaica. They are also prepared and served in many restaurants, especially seafood or beachside restaurants in Jamaica.

Bammy is made from bitter cassava. Traditionally, the cassava is grated and placed in a press bag (woven with thatch leaves) and placed in an outdoor press where heavy stones are loaded on. Once completely drained, but still a bit moist, the cassava is beaten in a mortar then sieved to a fine flour texture. Salt is then added to taste.