Mate con leche is an infusion prepared with the leaves of the yerba mate plant and milk. Traditionally, mate is prepared with water, but this version entirely replaces water with milk. The drink is prepared by adding warm milk to dry mate leaves.
It results in a creamier and less bitter version than the standard mate. Mate con leche can be enjoyed plain, but it is also commonly sweetened with sugar or honey, and it sometimes may include spices. This version is also prepared and served in a hollowed gourd, together with a
bombilla—a specialized metal straw that also functions as a sieve.