Toss the Biscoff cookies in a food processor (or if you don't have one, throw them in a large ziplock bag and beat them up with a rolling pin or something hard).
In a large bowl, combine the crushed Biscoff cookies and melted butter. Make sure to break up any large chunks. This should be a nice sandy texture.
Add the butter and Biscoff mixture to the pie pan. Gently press and compact this with your hands until you have formed a crust on the bottom and around the sides. Pressing the crust down now will help it stay together when you go to serve it.
Making the Filling
In a blender, add the silken tofu (always drain the tofu before adding) and vanilla. Blend until creamy and smooth.
Pour out the tofu mixture into a large bowl, and add in the other ingredients - peanut butter powder, brown sugar, flour, salt, baking powder, cinnamon and nutmeg. Whisk everything together really well until there are no lumps.
Assembly
Add the filling mixture to the pie pan (on top of the crust).
Bake for 43- 47 minutes (depending on your oven). The top should be browned and it should be pretty firm when it's done, with a slight jiggle left in the middle of the cheesecake.
Let it cool at room temperature (on the counter) for at least 2 hours.
Move to the fridge and allow it to cool for another 2 hours before you serve it!