Re: You can make beer with milk?
Certainly you can put some milk into malt when fermenting beer. However it simply sweetens it.
"Mackeson Stout is a milk stout first brewed in 1907. It contains lactose, a sugar derived from milk. Because lactose cannot be fermented by beer yeast, it adds sweetness, body, and energy to the finished beer."
I prefer Murphy. Proper Stout.
Milk on its own would be tricky, though yogurt and cheese are lower lactose (the milk sugars) than the source milk due to the creation process converting it. However fermenting milk into yogurt is using a bacteria not a yeast, so it's not alcoholic.
I don't know of any yeast that will convert lactose to alcohol, though such might exist.