1 egg
1 c. ice water
1 c. all purpose flour

Measure flour in a bowl and add COLD water. Stir slightly until flour is lumpy (do not overmix!). Add a cold egg and stir lightly - not too much! Batter must be cold at all times! Too much mixing, or if the batter becomes warm will make the batter doughy.

NOTE: The easiest tempura batter is bought at the store, but this way you can make your own.