Preheat oven to 375 degrees. Spray a 12-cup muffin tin with cooking spray.
In a large bowl, combine all wet ingredients: egg, brown sugar, maple syrup, vanilla, yogurt, oil, and almond milk.
To the same bowl, add dry ingredients: flax seed meal, whole wheat flour, all-purpose flour, oats, salt, cinnamon, baking powder, and baking soda. Stir until just combined. Fold in blueberries.
Divide mixture among 12 muffin cups and bake 20-22 minutes or until browned on top. Store in an airtight container.