01 - Preheat waffle iron according to manufacturer's instructions.
02 - In a medium bowl, whisk together Greek yogurt, eggs, milk, melted butter, and vanilla until smooth.
03 - In a separate bowl, combine flour, sugar, baking powder, baking soda, and salt.
04 - Add dry ingredients to wet ingredients, mixing gently just until incorporated. Do not overmix; a few lumps are acceptable.
05 - Lightly grease preheated waffle iron with melted butter or cooking spray.
06 - Pour approximately 1/3 cup batter per waffle into iron and cook until golden brown and crisp, 3-5 minutes per batch.
07 - Serve warm with fresh berries, honey, or maple syrup.