In small bowl, mix sweet potatoes, milk, egg, oil and lemon juice. In another bowl, combine flour, brown sugar, baking powder, baking soda and cinnamon.
Stir flour mixture into sweet potato mixture, stirring only until combined.
Heat a nonstick skillet coated with nonstick cooking spray over medium heat. Pour about one-fourth cup batter onto skillet and cook 1-2 minutes or until bubbly. Turn to cook on other side until light brown.