You have to admit there is something about linzer and other sandwich-type cookies. There's something about that buttery dough on the outside, a sweet, fruity filling on the inside and the whole thing dusted with powdered sugar that comes together in a perfect bite. Sandwich cookies from the supermarket never quite seem to absorb the flavor of the filling, probably too many preservatives keep them crisp. But homemade, or bakery made, cookies always, always get a bit softer with time, as the fruity filling seeps into the cookies. It's so goodOne of our favorite fillings is a classic middle eastern flavor, dates. They're so naturally sweet that only a bit of honey and salt is needed to make the most delicious cookie filling.