Cucas are dark, chewy Colombian cookies made with wheat flour and a syrup of panela boiled with whole cloves, spiced with cinnamon and ginger. There are no eggs in the dough, which is why they keep for days. They bake in about 20 minutes and make roughly 10 cookies.
The butter in this recipe is salted. If you use unsalted butter, add ½ teaspoon of salt to the dough. Cucas keep for several days in a closed tin and the spice settles as they sit, so they are often better on the second day.