Heat 2 tablespoons oil to 375 degrees F.
Combine in a bowl the beaten egg, milk, sugar, cinnamon and sour cream. Mix well and add flour.
Dip apples in batter and carefully place in oil. Cook for 1 to 2 minutes. Turn and cook 1 to 2 minutes more. Remove fritters and drain. Maybe sprinkled with powdered sugar, if desired. Serve warm.