Make some strong coffee or espresso using your preferred method. I prefer to use the Aeroperss for simplicity and quality.
Pour 1 tablespoon of the coffee into the mixing bowl, if still hot, swirl around the bowl to cool it down (to prevent partially cooking the egg). Next add the remaining ingredients and mix well.
Pour batter into preheated, greased waffle iron and cook for 2 heat-up cycles. This is roughly 3 minutes, but will vary based on the waffle iron and amount of contact the batter has with the heating plates.
Transfer finished chaffles to a cooling rack to prevent them from getting soggy.
Enjoy as is or top with some fresh whipped cream or low carb syrup of choice.