I have had cow free ice cream. There's a company who started doing it through a contract with Stanford University out in CA.

They grow whey proteins in fermenting tanks, same they use in the brewing industry, with a modified yeast that creates it when fed sugar instead off alcohol. It's then blended into coconut fat and some other ingredients. It was surprisingly similar in flavor, just not 100% in the texture. They also make whey protein products for sports nutrition. The process used 1% of the water used to make the equivalent volume of milk and obviously instead of acres of feed or grazing grown for the cow, it was all done in a 20 BBL tank that's roughly the footprint of a car. Really cool stuff. Sorry blanking on the name!

Edit: Brave Robot is the name!