To make a simple batter recipe for preparing fried fish, mix 1 cup of flour and 1/2 teaspoon of salt, beat in 2 cups of water, and set the batter aside for 30 minutes before using. For a crispier coating, substitute 1/4 cup of cornstarch for 1/4 cup of flour.
Variations of this simple batter recipe for fish include using baking powder, beer, or egg white. Batters with these ingredients have subtle differences in texture and taste.
Adding baking powder makes the batter crunchier. Mix 3/4 cup of flour, 2 teaspoons of baking powder and 1/2 teaspoon of salt together, whisk in 1 cup of water until the consistency is smooth, then use the batter immediately.
For a great-tasting simple beer batter, mix 3/4 cup of flour and 1/2 teaspoon of salt, whisk in 1 cup of beer until the batter is smooth, and use right away.
For a fluffy egg white batter, combine 3/4 cup of flour and 1/2 teaspoon of salt with 1 cup of cold water. Set the batter aside for at least 30 minutes. When it is ready to use, beat 3 egg whites with a pinch of cream of tartar until medium peaks form. Fold the egg whites into the flour and water mixture, and use it immediately.