Drain and rinse the cashews. In a high-speed blender
, combine the soaked cashews, agave, oil, cocoa powder, melted chocolate, vanilla, salt, and espresso powder and blend on high until the filling is completely smooth. It can take a few minutes of blending to get it smooth, depending on your blender. If the blender needs more liquid to get it going, add a tablespoon of almond milk to help it along.