Raw flour compared to flour, more slippery, finer material, fried out will have a kind of flour is not as crunchy. So, when frying fish pieces, remember to use raw flour instead of flour.
Two, first coated with starch or egg
The correct order is first coated with egg and then coated with egg wash.
The role of egg liquid is to make the food fluffy, more fluffy fried, while the role of starch is to lock the water, to maintain the moisture of the food, so that the food in the process of frying to maintain the tender texture. So you should wrap the egg first and then wrap the starch. And starch is more oil-saving.
So, when frying fish pieces, choose the right ingredients, choose the right order, the fried fish pieces will be crispy!