Mustard remains a typical produce of Monschau, and in the old mustard mill the traditional recipe is still being made. When it was installed in 1882, the mill relied on a waterwheel. Today, it's driven with electricity. The small shop sells a range of different varieties. Guided tours in German are given on Wednesdays and Fridays at 11.00 and 14.00h, with no reservation needed. Groups can make reservations for guided tours.