Mix the eggs, milk/buttermilk, melted butter, and vanilla together.
In a separate bowl, stir together the flours, baking powder, baking soda and salt.
Pour the wet ingredients into the dry, and stir to combine with a fork.
For waffles, the batter should be on the thin side, so if it seems too thick to pour into your waffle iron easily, add more milk/buttermilk. For pancakes, thicker is better.
Cook according to your waffle iron instructions.
Adapted from Vegetarian Cooking for Everyone by Deborah Madison