Milk

Milk is a dairy product that is enjoyed by both humans and Smurfs. In mainstream Smurfs media, milk is normally derived from cows.

Empath: The Luckiest Smurf stories
In the EMPATH: The Luckiest Smurf story series, milk mostly comes from the milksprout plants that grow in the Smurf Forest, containing the same flavor and nutrients as regular milk produced from cows. It is used for cooking and baking as well as for drinking. Baby Smurf's bottled milk usually comes from milksprouts.