I was challenged to see how much weight I could gain if I drank a 15,000 calorie shake each night before bed while gorging myself during the days to the best of my ability for 5 days in a row. I'm never one to turn down a challenge, so I accepted!  frosted donuts, a can of chocolate frosting, chocolate ice cream, heavy cream and a stick of browned butter. I chug the incredibly rich and creamy shake down while rubbing my belly and belching.