“Wisconsin only allows Grade A dairy products be sold within its borders,”
On the farm in Nebraska, the only butter we had was homemade with cream diverted from our product which we normally shipped to Lakevile, Minnesota by rail. When the cream can was full, I dropped it off at the depot on my way to high school. Some days later the empty cream can would come back and be sitting in front of the depot.
A side benefit of the homemade butter was real buttermilk. That no longer exists.
When I went off to college in Lincoln, I found Grade B butter in a grocery store. It was made from sour cream and was very good. Unfortunately, the public got suckered in by the government grading system and decided that there was something wrong with something that was Grade B and the product disappeared.