I need the best recipe for fish batter I have a fish & chip truck and my batter is not right HELP

Salt and pepper fish first, then take some flour and a little beer (dark ale is better) mix together till thick consistency, dip each piece one at a time make sure to coat them well, then drop in fryer also make sure to shake the basket so that they don't stick.

You need self raising flour, a little salt,and beer. Mix to a consistency of thick custard, dip your fish pieces in and deep fry.