If you are using plain ice cold water, use 1/8 teaspoon baking soda. If using the plain club soda, leave it out.

Mix the egg and the water or soda in a mixing bowl. Add in about a cup of flour and mix quickly, but do not overmix the batter.

Dip in your seafood, veggies, or meat, and fry immediately in hot oil. Cook until browned and done. Repeat.