Soak cashews in water for at least 2 hours and then drain

To make the bottom layer, place the walnuts, dates, and 1/8th of the salt in a food processor and pulse to break the ingredients down until they're crumbled. Process the mixture until it is ground up and sticking together when you squeeze a little in your hand.

Press the bottom layer into a small casserole or baking pan that has been lightly greased with olIve or coconut oil. Put in the fridge to chill while making the top layer.

To make the top layer, blend the cashews, blackberries, oil, remaining 1/8th of salt, and syrup in a high speed blender or food processor until as smooth as possible. Pour the top layer over the bottom layer in the pan and use a spatula to spread evenly.

Transfer to fridge and chill at least 3 hours. Cut into bar shapes and serve.