The phrase "chocolate factory" refers to a place where chocolate is made. It can also be used as a metaphor or symbol for something that is exciting, fun, or enticing. Full definition
It's nice to be able to call up a ranch or small chocolate factory and talk to a real person that has actually grown or packaged the product themselves. (margegranola.com)
He then built the first organic chocolate factory that is powered by green energy sources and they started producing organic chocolate in 2006. (earthtimes.org)