Flour
Cooking oil
Ice water
Egg
Salt
Pepper
Lemon juice (opt.)
Other spices (opt.)

As far as the amount of ingredients, you the cook be the judge. It all depends on the amount of shrimp you have to fry. If too much batter is made, it can be saved for a later use.

Put flour in bowl, add oil. Mix until paste is formed. Add egg and mix. Add cold water (ice cold). Add salt, pepper, lemon juice and other spices, if desired.

If batter is too thin add more flour, if too thick add more ice water. Your shrimp should just stick to batter and not drip.

Your shrimp must be thoroughly dried before they are put in this batter. Butterfly shrimp before putting in the batter. Let drain in a colander or dry with paper towels. Fry in deep fat.