Line an 8x8-inch baking pan with parchment paper.
In a bowl, combine all crust ingredients. Mix until a sticky dough forms, then press evenly into the bottom of the pan. Place in the freezer to set while you make the filling.
Drain the soaked cashews and add them to a blender with the remaining filling ingredients. Blend on high until smooth and creamy, scraping down sides as needed.
Pour the filling over the crust and smooth the top with a spatula.
Freeze for 3–4 hours or until firm. Once set, slice into bars and store in the fridge for up to 5 days or freezer for longer storage.