Cows can be raised and used to produce milk. To have cows in Stardew Valley, you will need a barn to keep them in, a silo to store hay, and grass so you can cut to get hay. If you don’t want to plant grass, you can purchase hay from Marnie's Ranch.

How to Milk Cow

To milk cows in Stardew Valley, you will first need to purchase a Milk Pail from Marnie's Ranch. Once your cow has matured, equip the milk pail and use it on your adult cow. The cow’s friendship or happiness directly correlates to what size milk you will get from your cow.