Press the biscuit base really firmly into the bottom of the pan to give a solid base for the filling. I use the end of my rolling pin to give me a flat surface to work with, but a small glass or even clean fingers work just as well.
The base can be baked if desired. Baking the crusts makes them firmer and less crumbly, so it totally depends on the texture you prefer. If baking, once pressed into the tin, bake them for 5-7 minutes at 180C/350F. Please make sure the bases and tin are fully cool before topping with the cheesecake filling, or you will end up with a melted cheesecake puddle!
The cream cheese should be at room temperature before mixing. Using the ingredient at room temperature will ensure the cheesecake filling is smooth and lump free.
Keep the double (heavy) cream cool until ready to use it. Cool cream whips up much more easily, and in this recipe takes just a minute or so to whip up and thicken.
I like to stir the blackberry jam before adding it to the cheesecake mixture. This is to help it spread more evenly throughout the cheesecake filling.
Drizzling the loosened blackberry jam over part of the cheesecake, as I have done, is simply my preference with how to decorate them. If you wish, you can simply place a spoonful of jam on top of each cheesecake with the fruit and flaked almonds before serving.