Free
Diet-Friendly Custard, Cake, and Pudding One-Mug Recipes: Quick, Easy and Guilt-Free Recipes for your Microwave (Microwave Desserts) by Elena Chambers
Plenty of great one mug recipes that incorporate low carbohydrate counts, low calorie counts and small serving sizes including:
* 4 Ingredient Chocolate Mousse
* One Mug Bread Pudding
* One Mug Cheesecake
* One Mug Crème Brulee
* One Cup Microwave Egg Custard
https://www.amazon.com/dp/B01B9047N0/
https://www.amazon.co.uk/dp/B01B9047N0/
https://www.amazon.ca/dp/B01B9047N0/