Date sugar is the healthiest sweetener, second only to fruit. It is made by drying dates and them making them into a powder. Once I open a package of date sugar, I store it in the refrigerator. I typically buy it online or at a local health food store, but have seen it at our local supermarket (both options are more expensive). If used in place of sugar in a recipe, it has a thickening effect, so you may need to adjust the recipe a bit by increasing the amount of liquid.