Is a BBQ really a BBQ if there is no Pistachio Fluff?
In a large bowl combine the whipped topping, pistachio pudding, marshmallows, and pineapple.
Cover the bowl with plastic wrap and chill for at least an hour. (Can be chilled up to 48 hours prior to serving.)
When you are ready to serve, top with additional whipped topping and sprinkle with chopped pistachio. (If you are like my grandma, you add one maraschino cherry on top!)