Measure out and prepare all the ingredients. Heat up a mini waffle iron.

In a bowl, add the egg and the shredded cheddar cheese. Mix together well.

Fry the bacon until crispy.

Using the waffle iron, spoon half the mixture into the waffle maker. Let cook for 3-5 minutes. Then spoon the rest of the mixture into the waffle maker and let cook for 3-5 minutes.

Cook the egg until it gets done to your liking.

Fix up the chaffle sandwich by adding mayonnaise, the bacon, egg, and sliced avocado. Serve and enjoy!