In a first aspect, the invention relates to an assembly (1) comprising a cooking pot (2) and a corresponding pot lid (3), for closing off the cooking pot, in which the assembly is provided with a vapour passage (14) for leading vapour out of the assembly. In particular, said vapour passage extends in the direction of the cooking pot. In further aspects, the invention relates to a method for downdraft extraction of vapour, and to a cooking pot (2) and a pot lid (3), which preferably are appropriate for use in said assembly.