From the Keurig website FAQs:
"Question Back to top
Is there any fat or sugar in your K-Cup® packs?
Answer
Coffee and tea K-Cup® packs do not contain fat or sugar. Natural and artificial flavorings added to coffee do not add any significant nutritional value. A cup of regular black coffee will contain approximately 2-4 calories (less than 1 gram carbohydrates) and 0 fats. Flavored coffees will add 0.8 calories, 0.3 grams carbohydrates and 0 fats. "
Technically, an IP coach would say "no." The reason is that if you deviate from the sheet, than it must be 0 carbs/0 sugar/0 fat. I personally wouldn't risk it-instead, try Torani sugar free vanilla in your regular or decaf coffee or Walden Farms chocolate or caramel sauce in your coffee. You could do that every morning and be fine