Traditional Basler Läckerli contain no butter or eggs; honey, sugar and almonds hold the dough together, which is why they keep for weeks.
A dense dough of honey, ground almonds, candied citrus peel, and a splash of kirsch is baked in a flat sheet, glazed while warm, and cut into small squares. Basel bakeries and Christmas market stalls sell them boxed as a portable, long-keeping street treat.