Most ambrosia salad recipes use whipped topping added in, whereas Watergate salad uses pistachio pudding. Ambrosia Salad. Similar to Watergate Salad or Millionaire Cranberry Salad this dish is more dessert like than an actual “salad” as we would know it. They do taste pretty similar. You never know how strong you … Church affairs, potlucks, or work functions, the ubiquitous ambrosia dessert always has a place on the table! Ambrosia salad is a classic for a reason! So, it’s a great make-ahead holiday side or dessert. This easy dessert salad is the perfect mix of sweet and tart fruit in a light and creamy fluff base. Ambrosia salad can also easily be customized. It’s usually made out of pistachio pudding mix, whipped topping, canned pineapple, and marshmallow. Not only does this dessert salad mix up in minutes, but it keeps well in the fridge for days. Watergate salad is a type of dessert salad (also served as a side dish) similar to ambrosia.