This is the fried catfish recipe my family asks for. It's crisp, golden, and not a speck of cornmeal in it. Flour and cornstarch give you a crust thin enough to taste the fish through.
Regulate the oil temperature: Hold the oil at 350°F. If it drops, the crust can turn soft and greasy. Fry in small batches, letting the oil recover between batches.
Don't trap steam: After frying, rest catfish on a wire rack (not paper towels) so the crust stays crisp. Salt immediately.
Make-ahead breading: Bread the fish up to 2-3 hours ahead, keep on a rack in the fridge, uncovered.
Avoid muddy flavor: Trim any visible catfish fat before breading.