- 1 cup all-purpose flour
- 1 cup white rice flour
- 2 teaspoons kosher salt
- 2 cups club soda
Whisk all-purpose flour, rice flour, and salt in a medium bowl. Gradually whisk in club soda until no lumps remain; adjust with more club soda or rice flour as needed to make it the consistency of thin pancake batter—it should be pourable, but thick enough to coat the fish.
Fit a large pot with a deep-fry thermometer and pour in oil to measure 2”. Heat over medium-high heat until thermometer registers 350°.
Working in batches of 5–7 pieces at a time, coat fish in batter, letting excess drip off, then carefully place in oil (to avoid splattering, lower fish into oil pointing away from you). Don’t overcrowd the pot: The oil temperature will drop dramatically and fish may stick together.
Fry fish, turning occasionally with a fish spatula or slotted spoon and maintaining oil temperature at 350°, until crust is puffed, crisp, and golden brown, about 5 minutes. Transfer to a wire rack set inside a rimmed baking sheet; season immediately with salt.