• Using a large cast iron dutch oven over medium to medium-high heat, heat the oil to 350 °F.
• Using a large bowl, add ½ cup flour.
• Toss the fish into the bowl a piece at a time and coat them with the flour.
• Set the flour coated fish aside on a wire rack.

Prepare Batter

• Using a large bowl, mix the flour, cornstarch, salt, baking powder, baking soda, and paprika together.
• Whisk the cup of beer (or ¾ cup beer and ¼ cup vodka) into the dry mixture. Do not over mix and do not let the mixture get too thin.

Fry the Fish

• Transfer a piece of fish to the batter bowl and coat it with batter, then dip it into the flour bowl to coat it lightly with flour, then put it into the hot oil. Repeat for all the pieces of fish.
• Flip the fish after about 3 or 4 minutes, then cook for another 3 or 4 minutes.
• The fish should be a crisp, golden brown on all sides.
• Transfer to a sheet pan lined with paper towels and sprinkle with kosher salt.
• Serve!