Preheat your waffle iron.
In a large bowl, whisk together 1,000 g sourdough discard, 4 eggs, 113 g melted butter, 2 tsp vanilla extract, 50 g sugar, 2 tsp cinnamon, and a Pinch of salt.
Add 2 tsp baking soda and whisk vigorously. Within about 10 seconds, the batter will become aerated and fluffy—watch the magic happen!
Pour the waffle batter into your waffle iron. Sprinkle any add-ins on top, if desired. Cook the waffles in your waffle iron according to the device's instructions. Enjoy!
