Wikipedia
Hopjes (; also referred to as Haagse Hopjes, hopjes from The Hague) are a type of Dutch sweets with a slight coffee and caramel flavour that originated in the 18th century.
The hopje is named after Baron Hendrik Hop who was recalled as an envoy in Brussels when the French invaded Belgium in 1792. He moved into rooms above the confectioners Van Haaren & Nieuwerkerk. He was addicted to coffee and the story goes that he one night left his coffee with sugar and cream on the heater, where it evaporated. On tasting the resulting substance, he loved it. His doctor advised him not to drink coffee so he asked the confectioner Theodorus van Haaren to make him some "lumps of coffee". After some experimenting, Van Haaren created a sweet made of coffee, caramel, cream and butter. The enthusiastic Baron Hop was keen to let his guests try his 'Hopjes', which quickly gained popularity. Van Haaren's successor eventually even got orders from abroad.
A typical characteristic of the hopje is that it does not stick and that it does not go soft over time. The Hague had a museum called Museum voor het Haagsche Hopje, which is dedicated to the hopje and its history, which has now closed down. J.P. Rademaker copied the hopjes and marketed them as "the only real Haagse Hopjes". He was the first to wrap the individual sweets in printed paper, which was not usual at the time. Rademaker and Nieuwerkerk litigated for many years. When the Rotterdam company Rademaker took Nieuwerkerk over in 1949 the dispute continued between the two Rademaker companies for 40 years, until a 1989 ruling from the Dutch Advertising Code Committee ordered Rademaker to desist from using the term "the only real Haagse Hopjes". Currently Rademaker Hopjes wrappers display the phrase "Alleen Echt Met Dit Merk" (Dutch: "Only Real With This Brand") instead.
Rademaker has been owned by RBV Leaf, part of the CSM group, since 1999.