In a bowl, whisk the first 5 ingredients. In another bowl, whisk egg, cheese, milk, orange zest, orange juice, melted butter and vanilla until blended. Add to dry ingredients; stir just until moistened.
Lightly grease a griddle; heat over medium heat. Pour batter by 1/4 cupfuls onto griddle. Cook until bubbles on top begin to pop and bottoms are golden brown. Turn; cook until second side is golden brown. If desired, serve with syrup and confectioners' sugar.