According to the invention, the window assembly in particular comprises all the components of a viewing window in the cooking chamber door. These also include, in particular, the panes providing the viewing window, seals, and preferably also a perforated plate which acts as a microwave trap for the viewing window.

The contact face particularly preferably rests in an even and defined manner on the contact portion of the housing assembly. Particularly effective and reliable sealing of the cooking chamber is achieved by this type of exact arrangement of the door or the contact face on the contact portion.

According to the invention, a stabilising device means that the contact face is stabilised, by means of additional components or by machining the contact face, in such a way that, despite the extent thereof, the contact face is rigid during use and cannot become distorted.

The cooking appliance according to the invention provides a number of advantages. One significant advantage is that, due to the particular design of the cooking chamber door having the extended contact face and the corresponding contact portion on the housing assembly, a portion for arranging technical components can be provided, the stabilising device on the contact face nonetheless permitting secure sealing of the cooking chamber door against microwave radiation.

The stabilising device effectively prevents the extended contact face of the cooking chamber door from becoming distorted or warped during opening, closing or generally during operation, with the result that there is no longer any peripheral spacing between the door and the loading opening. In the worst case, microwave radiation could then escape from the cooking chamber. This is effectively and reliably prevented by the design according to the invention of the cooking appliance.