is a typical Japanese dish that usually consists of seafood and vegetables that have been coated in a thin batter and deep fried.
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 the place of plain water makes 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 the 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.