Preheat your waffle iron to medium-high heat.
In a large bowl, whisk together the whole wheat flour, oat flour, protein powder, baking powder, baking soda, and salt.
In a separate bowl, combine the almond milk, Greek yogurt, maple syrup, and vanilla extract.
Pour the wet ingredients into the dry ingredients and mix until just combined. Fold in the blueberries.
Spray the waffle iron with non-stick cooking spray and pour the batter onto the hot waffle iron. Cook for 3-5 minutes, or until golden brown and cooked through.
Serve the waffles warm, with your favorite toppings.
