In a large mixing bowl, whisk together the sourdough starter, milk, vanilla, melted butter and flour.
Cover the bowl with plastic wrap and allow to sit on the counter overnight (8-12hours)
Next morning, you will find lots of bubbles in your batter, thanks to the fermentation process
Add in eggs, baking soda, baking powder & salt.
Stir and allow to sit for about 20mins, while you heat up the waffle iron.
Pour about 1/2 cup of batter onto the hot waffle iron, spread and cook for about 3-5 minutes on each side.
Serve with freshly whipped cream, maple syrup, fresh berries, peanut butter or any other of your favorite toppings.