Tempura

Tempura is a typical Japanese dish that usually consists of seafood and vegetables that have been coated in a thin batter and deep fried. Tempura has its origins dating back to the 16th century, when Portuguese Jesuits brought the Western-style cooking method of coating foods with flour and frying, via Nanban trade. A light batter is made of iced water, eggs, and soft wheat flour (cake, pastry or all-purpose flour). Sometimes baking soda or baking powder is added to make the fritter light. Using sparkling water in place of plain water has a similar effect. Tempura batter is traditionally mixed in small batches using chopsticks for only a few seconds, leaving lumps in the mixture that, along with the cold batter temperature, result in a unique fluffy and crisp tempura structure when cooked. The batter is often kept cold by adding ice or placing the bowl inside a larger bowl with ice. Overmixing the batter will activate wheat gluten, which causes the flour mixture to become soft and dough-like when fried. Specially formulated tempura flour is available in supermarkets. This is generally light (low-gluten) flour and occasionally contains leaveners such as baking powder.

Source: Wikipedia