If you are watching your caloric intake but want to indulge in an "informed" guilty pleasure, I have the perfect chocolate for you. "Rompicollo" by L'Agenzia per il Disegno e la Funzione is a tablet of chocolate whose portions come printed with calorie counts carved directly on the surface. The chocolate bar is divided into portions of different sizes with different calorie count.
This allows you to treat yourself to a bit of chocolate while keeping you aware. That way you'll be able to monitor how long you'll have to hit the treadmill for to make up for those excess calories.