Avocado-Mango Ice Cream

This recipe uses a combination of mangoes and avocados, but you can be a purist and make it with either all avocados or all mangoes. (If you use all avocados, you will probably need additional simple syrup.) Combining the two fruits produces a wonderful flavor and texture; the color is a delicate pale green. Because the sweet mangoes are high in fiber and avocados can contain up to 30 percent oil, it is possible to achieve a soft, smooth creamy texture without adding egg yolks or a lot of d