For you, Stephanie:)
CHOCOLATE COOKIE SANDWICHES with COFFEE CREME FILLING
I used a little less flour and baking powder to get a crisper cookie, then (once cooled) frosted bottom with frosting and stuck another to it, bottom to bottom. Filling is just frosting thinned with very strong coffee instead of milk. I grind coffee and add a small amount of hot water, then press liquid out- max flavor w/minimum liquid. The smaller cookie, the better, IMO.