Heat the oil to 340-350 degrees F.
Lightly flour shrimp. Pick the tail and dip shrimp in the tempura batter. Avoid dipping the tail into the batter.
Immediately deep-fry the shrimp until crisp. Just as any deep fry cooking, use caution to deal with hot oil.
When you fry, wait until the oil becomes hotter. Do not start putting shrimp in when the oil is cold, which usually makes the food very soggy with oil. The wooden chopsticks are the indicators to find the oil is hot enough. The right temperature is when the tip of the chopsticks start to bubble inside the boiling oil.