My grandmother used to make a cookie she called oesterfladen at easter time, but I can't find anything on google that looks even close. It was a sticky dough leavened with bakers ammonia that she spread in a layer on a pan, sprinkled with vanilla sugar, and cut into bars after it was baked. It was airy, lightly sweet, kind of dry but not crunchy. Hard to describe as I haven't had it in years. Does anyone recognize this or have a recipe?