Clasen Quality Chocolate, 420 E. Horseshoe Road, started off the new year in a unique way Wednesday.

At 1:22 p.m., the Watertown Fire Department responded to a call for a structure fire at the factory. According to Watertown Fire Chief Kraig Biefeld, the blaze started when a box full of products caught on fire, but the fire was limited to just the box. Sprinklers put it out before units arrived.

“The sprinkler system did its job. That’s why we advocate the use of sprinklers in buildings,” Biefeld said.

The fire department sent the on-duty crew and Biefeld, who went to the call, said with the fire out, the crew went to make sure the fire was out and to ventilate the building.

Mutual aid was initially called, but was quickly called off, according to Biefeld.

Clasen Quality Chocolate produces a variety of chocolate coatings of different colors, flavors and sizes as well as 20 different varieties of chocolate and numerous fillings and spreads.

According to the company website, Clasen Quality Chocolate, “has transitioned from a small, regional compound coating manufacturer to a major supplier of both standard and customized formulations and value-added, confectionery ingredients across North America” and has facilities in Watertown, Middleton with corporate offices and the company innovation center in Madison.