
Mango purée is a thick, smooth fruit purée of ripe mango flesh.
Ripe fruit blended and strained is the same thing made to order, and the variety matters more than the method. Fibrous mangoes need straining and sweet ones need less sugar in the drink.
Mango nectar
Purée let down with water and usually sweetened, so it pours like juice, and using it in place of purée leaves the drink thin.
Sweetened mango purée
Bar-supply purées are often sugared to a fixed brix so they behave predictably in a batch. That predictability is exactly what puts a recipe out when it was written for unsweetened fruit.
Fresh purée keeps a few days refrigerated and freezes well in portions. Commercial keeps to its date and wants the fridge once open. It darkens at the surface as it oxidizes, which is cosmetic until it also smells fermented.