Pistachio Fluff is an ambrosia salad that's made with pistachio instant pudding and cool whip.
In a large bowl add the cool whip and instant pistachio pudding. Mix ingredients together then place into the refrigerator for 5 minutes.
After the 5 minutes set up time. Add the whole can of crushed pineapple (juices and all), chopped pecans, and mini marshmallows. Mix all ingredients together place into the fridge for 4 hours to set up.
Serve with a maraschino cherry on top and enjoy.