Heat 3 cups oil in deep fryer or Dutch oven to 350 degrees. Heat remaining 1 Tbsp. oil in medium skillet over medium-high heat. Add fish filets to skillet and cook about 2 to 3 min. per side until cooked through. Remove filets from skillet and use a fork to flake fish into small pieces. Combine dry ingredients together in a large bowl. Add eggs to a small bowl and whisk until lightly beaten. Add buttermilk and sour cream. Mix wet ingredients into dry until just moistened. Fold in cooked, flaked fish. Add spoonfuls of batter one at a time in batches to hot oil and fry until golden brown. Remove to paper towel-lined plate to drain.
Serve with a side of our Bajan Hot Pepper Sauce for dipping.