01 -
Preheat vegetable oil in a deep fryer or medium saucepan to 350°F (177°C), ensuring there is enough oil to fully submerge the fish fillets.
02 -
In a medium bowl, blend all-purpose flour, cornstarch, baking powder, kosher salt, and cayenne pepper. Gradually whisk in the water until a smooth, slightly foamy batter forms.
03 -
Pat fish fillets dry with paper towels to remove excess surface moisture. Dip each fillet in the batter, ensuring a thorough and even coating.
04 -
Carefully lower the battered fish fillets into hot oil. Fry for 3 to 4 minutes or until golden brown and crisp, turning as necessary for even cooking. Avoid overcrowding the pan.
05 -
Use a slotted spoon or tongs to transfer fried fillets to a wire rack set over a tray, allowing excess oil to drain before serving.