Step 1: Prepare the Fish and Dredging Station
Thoroughly pat your fish fillets completely dry with paper towels. This is a critical step; a dry surface helps the batter adhere properly. Season the fish pieces generously on all sides with salt and pepper. Set up a shallow dish or plate with the ½ cup of flour for dredging.

Step 2: Heat the Oil
Pour the oil into a large, heavy-bottomed pot, Dutch oven, or deep skillet. You want the oil to be at least 2-3 inches deep. Attach a deep-fry or candy thermometer to the side of the pot. Heat the oil over medium-high heat until it reaches a steady temperature of 375°F (190°C). Maintaining the correct oil temperature is the most important key to crispy, not greasy, fish.

Step 3: Prepare Your Landing Zone
While the oil is heating, set up a wire cooling rack over a baking sheet. This is where you will place the fish immediately after frying. Placing it on a wire rack allows air to circulate, keeping the bottom of the fish just as crispy as the top. Do not place fried fish on paper towels, as this will trap steam and make the crust soggy.

Step 4: Make the Batter (At the Last Minute)
Do not make the batter ahead of time. You want to make it right before you are ready to fry to keep the beer’s carbonation as active as possible. In a large mixing bowl, whisk together the 1 ¼ cups of flour, cornstarch, baking powder, salt, pepper, paprika, and garlic powder. In a small bowl, lightly beat the egg yolk. Create a well in the center of the dry ingredients and add the egg yolk. While whisking continuously, slowly pour in the ice-cold beer. Whisk just until the batter is combined. A few small lumps are perfectly fine—do not overmix, as this will develop gluten and make the batter tough.

Step 5: Dredge and Batter the Fish
Working with one piece of fish at a time, dredge it in the plain flour, ensuring it is lightly coated on all sides. Shake off any excess flour. This dry layer acts like a primer, giving the wet batter something to cling to. Immediately dip the floured fish into the beer batter, turning to coat it completely. Let any excess batter drip off for a second or two.

Step 6: Fry the Fish to Golden Perfection
Carefully lower the battered piece of fish into the hot oil. Do not overcrowd the pot. Fry only 2-3 pieces at a time, depending on the size of your pot. Overcrowding will cause the oil temperature to drop dramatically, resulting in greasy, soggy fish. Fry for about 4-6 minutes, turning the pieces halfway through, until the batter is a deep golden brown, beautifully puffed, and crisp.

Step 7: Drain and Season
Using a spider strainer or slotted spoon, remove the fish from the oil and transfer it directly to the prepared wire rack. Immediately sprinkle the hot fish with a little more salt. The salt will adhere perfectly to the hot, freshly fried surface. Allow the oil to return to 375°F (190°C) before frying the next batch.