What does a passenger aircraft galley ('kitchen') look like?
An aircraft Kitchen is known as the Galley and the picture is from a Lufthansa A380.

Some equipment you will see here are: 


Food Oven, the door with a black knob in the middle of the picture.
Coffee Machine, with the pot, in the right side of the picture.
Large Trolleys, filled with food and/or drinks, on the floor. Weight about 25kg empty.
Trash Bin, the darker grey unit on the right on the floor. Wheeled off like everything else. Some have proper trash electric trash compactors as well in trolley format.
Fuse Panel, located in the middle along the top row. There is in general a fair bit of power going into this area. 
Smaller Storage Containers, that can handle drinks or bottles for instance.
General Storage Space: The galley also provides a bit of space for anything from the children's toys and newspapers to emergency equipment. You can see some compartments for this in the upper-left corner and a symbol that a smoke hood is stored in one of them.


Quick design comment:

Aircraft galleys are hotspots for corrosion due to the liquid in the area and is the cause for particular attention during maintenance. Most aircraft galleys are generally very similar in design.


  Galley equipment comes in 2 basic universal standards - namely ATLAS and KSSU. These have their origins in legacy maintenance resource pools (ATLAS = Alitalia, TAP, Lufthansa, Air France, Sabena and KSSU = KLM, Swissair, SAS, UTA) and have subsequently developed into industry standards to enable modular equipment interchange.


These standards for instance specify the height, width and depth of trolleys. I gather that ATLAS standard is more prevalent (80% of galleys by one source) but both exist. Other ideas and concepts have popped up but since changing the stuff is very expensive there's not been a real push for it. I think I've also read that the original standard was pretty well thought through.

Naturally, this is a long-distance galley that will serve usually two meals. Equipment and size are scaled to the needs of the airline and can vary greatly between operators.