Place all dry ingredients in a coffee mug. Stir to combine.
Add the egg and oil. Stir until thoroughly combined.
Microwave for 1 minute. Use a knife if necessary to help remove the muffin from the cup, slice, butter, eat.
Note: Your MIM can be toasted once it's cooked and topped with cream cheese if you like. Replace the cinnamon with other spices, sugar-free syrup or 1/2 tsp unsweetened cocoa (net carb count will be .2g higher). Add a tablespoon of sour cream for a moister MIM. Change the shape by making it in a bowl.
In order to calculate Net Carbs of any whole food item, it's a simple calculation based on the Nutrition Facts panel:
Total Carbohydrates - (Minus) Dietary Fiber = (Equals) Net Carbs
For low carb products sweetened with sugar alcohols (ie: glycerin, maltitol, etc), refer to the Nutrition Facts panel of the product:
Total Carbohydrates - (Minus) Dietary Fiber - (Minus) Sugar alcohol = Net carbs
This reflects the fact that Dietary Fiber doesn't impact blood sugar levels. Sugar alcohols also have a negligible impact on blood sugar, they too are subtracted from total carbs to yield the Net Carb count.