The crisp golden surface encases a slightly chewy and deeply flavored center. The banana, walnuts, cacao nibs, and sourdough starter contribute their unique strengths to shape these awesome sweet waffles.
Add the buttermilk and butter to a saucepan and heat over a low heat.
Once the butter is melted add 1 Tbsp sugar.
Whisk the buttermilk and butter mixture until the sugar has dissolved.
Remove from the heat and allow to cool until lukewarm. Make sure it is only lukewarm. If it is too hot it will kill the yeast from the sourdough starter.
Add the sourdough starter to the buttermilk mixture and stir to combine.
Slowly add the flour to the buttermilk and sourdough starter, whisking until smooth.
If necessary, add some water so that it is the consistency of a waffle batter (which is a little thicker than a pancake batter).
Cover and refrigerate overnight.
Making the waffles
Whisk the eggs.
Fold the eggs, salt, and baking soda into the waffle batter.
Fold in the mashed banana, toasted walnuts, and cacao nibs.
Make the waffles according to the waffle maker instructions.