Grease a ramekin dish (or very large coffee mug) with coconut oil or butter.
Mix all the ingredients together with a fork to ensure it is lump free.
Cook the 1-minute keto muffin in the microwave on HIGH for 45 seconds - 1 minute. Alternatively, they can be baked in an oven, at 200C/400F for 12 minutes.
Cut in half and serve. (toasting or frying is optional)
Some people have found some success in using 2 tablespoons of almond flour rather than coconut flour. Please monitor the cooking time you require using your microwave. Cooking times will vary considerably and will also be dictated by the size of the coffee mug or ramekin you have used.