1. Weigh or lightly spoon flours, potato starch, and flaxseed meal into dry measuring cups; level with a knife. Combine flours, potato starch, flaxseed meal, sugar, baking powder, baking soda, and salt in a large bowl, stirring with a whisk. Combine buttermilk, vanilla, and eggs; stir with a whisk. Add to flour mixture, stirring until smooth.
2. Heat a nonstick griddle or large nonstick skillet over medium heat. Pour 2 tablespoons batter per pancake onto pan; cook 1 minute or until tops are covered with bubbles and edges look cooked. Carefully turn pancakes over; cook 1 minute or until bottoms are lightly browned. Serve with maple syrup and blueberries.