Grab a baking dish and lay down graham crackers as a base.
Evenly spread your whipped cream mixture atop the crackers.
Now layer the dish with sliced mangos.
Repeat the process. Add another layer of graham crackers, whipped cream mixture, and sliced mangos.
You're nearly finished. Just sprinkle the dish with powdered pistachio or cashew and stick it in the fridge overnight.
Check out a video version of the recipe below.
