Whisk together the flours, baking powder, salt and flax seed. Stir in the milk, sweetener, vanilla and peanut butter. Heat a pan over medium heat while batter rests. Lightly grease the pan with a thin coat of oil and dollop heaping tablespoons of batter into the pan. Let cook for 1-2 minutes, or until browned on the bottom. Flip and let cook for another minute. Serve warm, with bananas, honey, more PB, jam, etc.