Nutrition: This has 6.2 NET carbs for the entire cake.Cold Butter: If your butter is cold simply microwave it in the mug for a few seconds before adding the other ingredients.Prep Ahead: You can mix up the dry ingredients ahead of time so when you are ready to cook this just add the wet ingredients.To Reheat: warm the cake up using the microwave. Heat it for 10-20 seconds and enjoy it. Notes on Sweeteners: