Crispy Fish Fillet Recipe

Brine the fillets

In a shallow bowl or container combine 2 cups cold water with 1 tablespoon salt and 1 teaspoon sugar. Stir until dissolved. Submerge the fish fillets in the brine for 10–15 minutes in the refrigerator to season and firm the flesh. After brining, remove fillets, pat very dry with paper towels (this step is critical for crispiness).

Mix dry ingredients

In a wide shallow dish or bowl whisk together 1 cup all-purpose flour, 1/4 cup cornstarch, 1/4 cup fine cornmeal (if using), 1/2 teaspoon baking powder, 1 teaspoon salt, 1/2 teaspoon ground black pepper, 1/2 teaspoon smoked paprika and 1/2 teaspoon garlic powder. Ensure the mixture is evenly combined so every fillet gets consistent seasoning.

Dredge briefly

Lightly toss each patted-dry fillet in the dry mixture, shaking off excess. This light initial coating helps the batter adhere and creates an extra crunchy layer.

Prepare batter

In a separate bowl whisk together 1 large egg and 3/4 cup cold club soda (or sparkling water). The batter should be thin—about the consistency of heavy cream. If it seems too thick, add up to 2 tablespoons cold water to thin. Keep batter cold; place bowl over an ice bath briefly if your kitchen is warm.

Batter the fillets

One at a time, dip the lightly dredged fillets into the cold batter, letting excess drip off for 5–8 seconds so a thin, even coat forms. Do not over-batter; a thin coat fries crisper.

Heat the oil

Pour about 4 cups (or enough to give a 1–1.5 inch deep frying bath) of vegetable oil into a heavy skillet or Dutch oven. Heat over medium-high until the oil reaches 350–365°F (175–185°C). If you don't have a thermometer, test with a small drop of batter — it should sizzle and rise immediately without burning.

Fry the fillets

Carefully lower each battered fillet into the hot oil, working in batches so pieces don't touch and the oil temperature recovers. Fry for 3–4 minutes per side (6–8 minutes total) for typical 4–6 oz fillets, or until the coating is deep golden brown and the fish is opaque and flakes easily with a fork. Maintain oil temperature between batches; adjust heat as needed.

Drain and rest

Using a slotted spatula or tongs, transfer cooked fillets to a wire rack set over a baking sheet or paper towels to drain. Let rest 1–2 minutes to finish cooking and crisp up. If serving multiple batches, keep cooked fillets warm in a 200°F (95°C) oven on the rack to preserve crispness while frying remaining pieces.

Finish and serve

Sprinkle chopped fresh parsley over the fillets if desired and serve immediately with lemon wedges. Optional accompaniments: tartar sauce, malt vinegar, or coleslaw.