Tempura flour is a finely ground white flour used to prepare tempura batter, a popular Japanese dish consisting of pieces of vegetable or seafood coated in a slightly crispy batter and fried in hot oil. Tempura flour is rich in starch and contains ingredients such as potato starch and wheat flour to add texture and flavour to the batter. it is easy to use and makes crispy, tasty tempura in just a few minutes.