In a large bowl, whisk together the greek yogurt, milk, eggs and vanilla extract until well blended. Add the flour, baking powder and salt, and stir to combine. Fold in the blueberries.
Spray waffle iron with cooking spray. Pour ⅓ cup batter into preheated waffle iron. Cook until the outsides of the waffles are golden brown and slightly crisp on the edges, about 3-5 minutes.
Serve immediately with fresh blueberries, or keep warm on a wire rack in the oven before serving.
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Notes
Make ahead: The waffle batter can be kept in the fridge covered for up to 3 days.Reheat: Any leftovers can be reheated in the oven at 360F til crispy.Tip: Preheat and grease your waffle iron before adding the batter.