Preheat your waffle iron to the manufacturer's recommended setting (medium-high heat).

In a large bowl, whisk together the eggs, milk, melted butter, and vanilla extract until thoroughly combined.

Add the buckwheat flour, sugar, baking powder, and salt to the wet ingredients. Stir until just combined; a few small lumps are perfectly okay. Let the batter rest for 5 minutes to slightly thicken.

Lightly grease the hot waffle iron with cooking spray or a little butter.

Pour the appropriate amount of batter onto the center of the iron, spreading it slightly if needed.

Close the lid and cook for 4-5 minutes, or until the steam stops and the waffles are beautifully golden brown and crisp. Carefully remove the waffle.

Repeat step 6 with the remaining batter.

Serve warm, topped with maple syrup, fresh fruit, butter, or whipped cream for a delightful breakfast experience.