Make sure that everything is at the room temperature and coconut oil is melted before starting.
Put everything in the food processor and blend till completely smooth.
Transfer to your container lined with a baking parchment, sprinkle with chopped walnuts and refrigerate overnight or pop in the freezer for 1 hour.
Remove from the tin by pulling the edges of baking parchment, dust with cacao if desired or frost with a ganache and cut in the squares. Keep them in the freezer for best results.
For the ganache
Everything should be at the room temperature before you start blending. First blend dates and plant-based milk till smooth add the rest of the ingredients and process till everything is evenly incorporated.