Most really light and fluffy tempuras, in my experience, have relied on carbonation. This version uses whipped egg whites for a slightly more stable batter...and some added protein, too!
(Note: The photo is not my own. I'll try to remember and take one next time around; every time I make tempura, by the time I've fried everything, I'm hungry and ready to eat while it's still hot and crispy!)
Ingredients
½ C flour
¼ C + 2 T cornstarch, divided
¼ t cayenne
¼ t cayenne
¼ t garlic powder
½ t salt
2 T sesame oil
2 large egg whites, room temp
sliced vegetables or shrimp (or whatever you want to prepare with the tempura)
oil for frying -- vegetable oil, peanut oil, sesame oil...
sauce for dipping (plenty of options, including store bought varieties)
Directions
Combine flour, ¼ C cornstarch, cayenne, garlic powder and salt in a medium bowl. Stir in 2 T sesame oil, and 2/3 C cold water until batter is smooth. Refrigerate until well chilled (about an hour).
Slice and prepare vegetables, shrimp, etc. Toss with remaining 2 T cornstarch.
Heat frying oil in a large, wide pot to 375° F.
Beat egg whites until soft peaks form. Gently fold in chilled batter in a wide, shallow bowl. A few at a time, drop vegetables (shrimp, etc.) into tempura batter; transfer to hot oil. Cook until golden brown, turning as needed. Using tongs, remove from oil onto paper towel lined plate. Season with salt, if needed.
Serve with dipping sauce.