Sapa is a rustic Sardinian cake made with grape syrup (sapa)—a thick syrup made by cooking and reducing grape juice. The cake was traditionally made in fall and winter when fresh grape syrup would be available following the grape harvest.
It is often prepared for special occasions, such as All Saints Day or Christmas. Varieties of this fragrant cake are found across Sardinia, and recipes often include different ingredients. The basic version usually consists of grape syrup, flour, eggs, milk, raisins, and baking powder.