Yes. Using frozen raspberries in place of fresh ones do not affect the taste or texture of the cheesecake. In fact, purees made with frozen raspberries are darker and will colour the cheesecake with a gorgeous pink hue. The only time you should use fresh raspberries instead of frozen is if you want a fruit topping. Frozen raspberries tend to become mushy when left to sit and will bleed its juices. This can make a mess on your cheesecake and look unappetising.