After visiting the Mt. Horeb Mustard Museum, this is the place to go for lunch. It's retro-fabulous. They have a counter with the little round stools, or regular booths or tables. They have the old-style malt mixers, you can get the standard burgers and fries. They also have vegie-oriented options or salads.
You MUST get a rosette if you go here. You can get one as an add-on to a shake, or buy them separately. It's a deep fried cookie made on a branding-iron type form, then dipped in sugar. The owner comped us two for our kids as we were finishing lunch.
The service was friendly. The food was good. It's worth the trip all by itself. But you also get to see trolls! It's great!