There are a few ways to tell if a cheesecake is done. The most reliable way is to use a cake tester or toothpick to insert it into the center of the cake. If it comes out clean, the cake is done. Another way to tell is by lightly pressing down on the center of the cake- if it springs back, it’s ready. Finally, you can also give the edge of the cheesecake a slight wiggle- if it’s set and doesn’t move, it’s done.