"The plant is fully operational at this point," said Kevin Silva, Warrell spokesman.
The Warrell Corp., a Cumberland County-based confectionery maker, purchased the assets of Classic Caramel in April after the company quietly shut down operations in late 2008.
Classic Caramel has a nearly 100-year history of making candy in downtown York.
The plant on West College Avenue near the Codorus Creek that would become the now-Warrell Classic site first opened in 1914.
Silva said earlier this week the company is hiring three machinery operators and packagers, a cook and a maintenance worker to augment the roughly nine employees currently working at the site.
Silva said the operation is currently making candy for previous Classic Caramel customers and is building inventory.
On Wednesday, a fleet of contractors on-site was seemingly as large as the staff of Warrell employees. Equipment has been coming into the site to help make products.
A hole had to be cut in a wall of the old building to make way for machinery.
Also, Warrell is adding to the site a new product: Slo Poke, a bite-sized caramel product originally dating to 1926, according to Warrell.
The Slo Poke brand changed hands several times over the years, and Warrell acquired the license to make it in June.
Kevin Schreiber, York's economic development director, said the company's new beginning is exciting for the city.
He said the site is in the Codorus Corridor of the city, which is targeted for overall economic development.
Warrell's interest helps show there is a base in York for manufacturers to use to their advantage, Schreiber said.