Preheat your waffle iron.
Add the oats to a blender and blend until fine. If using oat flour, mix all of the ingredients in a large bowl.
Add all remaining ingredients except for flour and blend until smooth (don't over-blend).
Add the all-purpose flour last and pulse in the blender until just combined, being careful not to over-blend.
Add ⅔ cup of batter to your waffle iron and cook until set and lightly golden, about 2 to 2 ½ minutes depending on your waffle iron. I recommend checking right before 2 minutes. Repeat with the remaining batter.
