Crush the ammonia cakes fine.
Cream the butter and sugar. Sift the flour and add. Measure ammonia and add. Beat well. Add the almond extract.
Form into small balls and bake in a slow oven preheated to 325 degrees for 10 to 12 minutes on greased and floured cookie sheets. Watch the cookies carefully because they burn easily.
NOTES : Baker's ammonia (ammonium carbonate) can be purchased by the ounce in drugstores.