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