So it could be 1 of 2 things (or both): If you overly softened the cream cheese, which can happen by trying to speed up the process and putting it in the microwave, your cheesecake can get runny. Also if you used a very runny chocolate syrup. Some chocolate syrups are more liquid than others. I used a relatively thicker one (the Ghirardelli brand). If you are using a very liquid syrup, then you may want to decrease the amount in half, or start with half and add it to get to the consistency we are looking for.