Add walnuts to food processor and process until the big chunks are gone.
Add in the rest of the brownie crust ingredients and process until it becomes one big ball of dough.
Pat the crust down with your hands or a spoon into a 9in glass pie dish.
Cream Filling
Drain and rinse cashews.
If you have a vitamix add all the ingredients together and blend until smooth.
If you have a regular blender or food processor, blend the cashews separately, adding a little bit of milk at a time until you have a smooth cashew cream.
Then add in the rest of the ingredients and blend until smooth.
Add the filling to the crust, smooth it with a spoon, and wiggle the dish to release any air bubbles.
Freeze for 1 hour.
Refrigerate for the remainder of the pie's life.
Notes
Coconut milk may be substituted for water or any other nut milk. Walnuts may be substituted for pecans.