Champurrado is a chocolate-based atole, a warm and thick Mexican beverage, prepared with either masa de maíz (lime-treated corn dough), masa harina (a dried version of this dough), or corn flour (simply very finely ground dried corn, especially local varieties grown for atole); piloncillo; water or milk; and occasionally containing cinnamon, anise seed, or vanilla. Ground nuts, orange zest, and egg can also be added to thicken and enrich the drink. Atole drinks are whipped up using a wooden whisk called a molinillo. The whisk is rolled between the palms of the hands, then moved back and forth in the mixture until it is aerated and frothy; a blender may also be used.