1. Water + butter
1 cup
water
1 tbsp
melted butter
Best swap: Water + butter. Use 1 cup water plus 1 tbsp melted butter per 1 cup.
In most baking milk is just liquid plus a little fat, so it is easy to replace with other dairy, canned milk, or a splash of water and butter.
Whisk 1 tablespoon of melted butter into 1 cup of water, or mix equal parts evaporated milk and water. Any unsweetened plant milk also works cup for cup.
Yes, though you lose a little richness. Adding 1 tablespoon of melted butter per cup of water replaces the fat milk would have contributed.