Pour oil into deep fat fryer or 2-quart saucepan. While oil is heating, combine corn meal, flour, baking powder and salt in medium bowl. Add milk, egg and onion; mix well. Drop by rounded teaspoonfuls into deep, hot oil (375°F). Fry only a few at a time until golden, about 3 to 4 minutes. Turn once with slotted spoon for best browning. Remove from oil; drain on several layers of paper towels. Serve warm.