Cash only.
I've been to the other Dairy Freeze which was in a small town that I cannot remember the name of, and it was in my memories ever since (the ice cream, not the town, obviously).
Last time I had a chocolate milkshake. This time I had an insanely delicious salted caramel cookie ice cream in a cup.
SO GOOD. GO HERE! DO IT.
Long line but it went fast. No bathroom. Picnic tables out front and a small parking lot.