Add all dry ingredients - oat flour, almond flour, ground flaxseed, baking powder, sea salt, coconut sugar, and cinnamon to large mixing bowl. Whisk to combine.
Add wet ingredients - eggs, almond milk, and vanilla and stir until well mixed and no clumps.
Once waffle maker is hot, add nonstick cooking spray to grease well. Then pour waffle batter to cover large 4 square waffle iron and cook 5-6 minutes, checking periodically until waffles are cooked to your preference.
Repeat with remaining batter. Yields 8-9 square waffles.
Nutrition info is for two squares, I got a total of 9 small squares with this recipe. Nutrition info does NOT include toppings.