Crack the eggs into a mixing bowl and whisk.

Whisk in the mashed banana, vanilla extract, and cinnamon until smooth and there are no apparent lumps.

Add the coconut flour and whisk until mixture is well-incorporated.

Oil the waffle maker with coconut oil and heat. Pour in half the batter, close, and cook 5 minutes, or until browned. Open the lid and gently remove the waffle, then transfer to a plate. Pour in the remaining batter and repeat.

Serve immediately.