This recipe for Swedish drommar, meaning 'dreams,' comes from my grandmother, writes Elizabeth Wigg Maxwell of New Providence, New Jersey. She and my mother made these every Christmas when my siblings and I were growing up. As children, we were amazed that my mother had to go to the pharmacy to obtain one of the ingredients: ammonium carbonate. Equally incredible was the fact that something which smelled so horrible helped make such delicious cookies! Years ago, I began baking drommar for my own family. I called the local pharmacy to request the unusual ingredient and was delighted when the pharmacist said, 'You must be making those Swedish cookies!' Ammonium carbonate, used by European bakers, makes especially crisp cookies. Its smell, which you may find off-putting while making the dough, disappears completely in the baking process.