The Froth House is indeed one I those great local cafés that Madison has to offer. I use to come here on a weekly bases when I was a student at West High School years ago. I fell in love with their Formaggio which is a basically a gourmet style grilled cheese sandwich. The butter they use is what makes this sandwich a fine dish. I also liked ordering their smoothies because they were so thick. Honestly, any one of their smoothies will serve as a meal. They are extremely fulfilling.
Really cool joint to check out if you're in the area. Seating can be problematic as it's a very tiny cafe.