This recipe has been temporarily removed, as many readers have complained that these cookies are overly dry and crumbly. I want to rework this recipe and retest it, to make sure it is reliable and good before reposting. My apologies to anyone who has had a negative experience with it.
These have stayed fresh in a well-sealed container at room temperature for about 4 days, and are still light and crispy and delicious. I froze some of the dough, and will be sure to let you know how it it bakes after being frozen!