In a bowl, combine flour, brown sugar, baking powder, salt and cinnamon. Stir in milk, egg yolks, and vanilla. Add apple and pecans. Beat egg whites until stiff peaks form; fold into batter. Pour batter by quarter cupfuls onto a hot greased griddle or skillet. Turn when bubbles begin to form and the edges are golden. Cook until the second side is golden. Serve with Apple Spice Syrup.