Postre de natas is a traditional dessert made with a combination of milk, egg yolks, and sugar syrup. Due to the fact that the preparation of postre de natas is time-consuming, it is usually made for special occasions. The milk is heated, and milk skin and cream is skimmed off the top, then combined with beaten egg yolks and sugar syrup.

Once assembled, the dessert is usually garnished with a few raisins on top before it's left to chill and thicken in the refrigerator.