I never thought there is such a thing as mustard museum. It is relatively small museum with the exhibit in a lower floor and the tasting room/ gift shop on the upper level.
Exhibit review: Basically you get to see all kinds of mustard in the world. The different mustard cans are organized by states and country. All of them were displayed on the shelf on the wall. I think it would make a great back drop if you are into selfies. There is a small room with seating and documentaries on mustard.
Gift shop review: I love that they let customers try out every single sample of mustard they have. You just bring the mustard bottle/ can to the counter and ask for a sample. They have from savory to sweet flavor, literally anything you can think of. My favorite was the black truffle mustard, with the amazing truffle flavor and fattiness.
Overall I spent about 30 mins to an hour here and I did a lot of tasting! If you live near and haven't been here, definitely stop by because it is free!