Add cooking oil to a saucepan and over medium heat, bring oil to about 350 degrees F (180 C).
*If you don’t have a candy/oil thermometer, to test the oil, drop a dot of the frying batter to the oil. The batter should drop to the bottom of the pan and in about 3 seconds float back to the top.
Or with a wooden chopstick, place it into the oil and the sides of the chopstick should slightly bubble. This is when your oil is ready!