Pour oil (for frying) into deep fat fryer or 3-quart saucepan; heat to 375° F. While oil is heating, combine corn meal, flour and salt in a medium bowl. Add milk, egg and oil; mix well. Set aside. Put 1/4 cup flour (for additional coating) in a shallow cereal or fruit bowl. Set aside. Insert wooden skewer in one end of each frankfurter. Coat with additional flour; dip into corn meal mixture. Fry a few at a time until golden brown, about 3 to 4 minutes.