This recipe was passed along to me a number years ago when I made mention I was looking for new recipes to add to my collection for Christmas baking. This excellent crispy cookie is not only great at Christmas, it's one of those simple delights great to serve for any occasion ... one of those 'looks simple but you can't just eat one' kind of cookie. I suspect the cream of tartar makes for a crispy light cookie. NOTE: any fine coconut can be used when making these cookies, do not substitute with medium or coarse coconut, they just do not work for these cookies. Fine coconut is readily available in the baking section of most stores.