Once your oil has reached 375° F, dredge a fillet of fish into the batter and carefully place it into the hot oil and allow to cook for 2-4 minutes or until the batter is golden brown. When your fish is done, it should have an internal temperature of 145° F. If you have room in the pot, repeat with the other fillet, but don't crowd the pot. I cook my fillets one at a time. Once each fillet is done, carefully remove with a skimmer or large slotted spoon and transfer to a cooling rack or a plate lined with paper towels to rid of excess oil.