There are so many summer fruits that are suitable for making desserts that I sometimes have a hard time deciding what to use... However, recently I came across frozen lychee puree in a
restaurant supply store and could not resist buying some. Although it is quite expensive, this kind of ingredient is hard to find elsewhere.
Imported from France, the puree contains 91% lychee and 9% invert sugar. But what is invert sugar? Essentially it is table sugar sucrose (disaccharide) that has been heated with an acid, usually cream of tartar. It then breaks down into glucose and fructose (monosaccharide), which will remain in liquid form. Invert sugar is widely used in the world of bakery and confectionery. It improves texture and, as a natural preservative, helps to extend shelf life. It is great in making ice cream because it keeps crystallization under control and gives a smoother consistency. (Click
here for more information)
Since lychee puree is low in pulp and high in water content, it needs to be cooked with the milk and cream for the extra water to evaporate. Otherwise, the ice cream will have an excess of ice crystals.
