The Mac Factory serves only mac 'n' cheese. The shop makes six different flavors with different toppings. It uses a béchamel base mixed with cheddar, salt, parsley, and pepper. It's located at Camden Market in London. The Mac Factory in Camden Market in London serves only mac 'n' cheese. The shop makes six different flavors with different toppings including mushrooms, chorizo, chilli con carne, jalapeños, and pesto. "We came up with this idea in about 2014.