In a mixing bowl, combine flour, sugar, baking powder and salt. This can also be stored and made ahead for later.
In a small bowl, whisk together eggs, milk, melted butter, and vanilla extract.
Pour the milk mixture into the flour mixture and whisk until combined. Let sit for several minutes while iron heats up.
Spray waffle iron with baking spray before the FIRST batch only. Ladle into preheated waffle iron and cook until golden brown. For the "DASH" brand, this will be about 3- 3 ½ minutes each.