This will be the first of many posts relating to how to make gold using the auction house.

Cocoa Beans come from Imported Supplies which can be purchased using Chef's Award from Bario Matalli next to the stormwind cooking trainer (The one close to the stockades).

Currently on the Proudmoore realm Cocoa Beans sell for about 2g each. You will typically get 2 stacks of beans from the imported supplies, so I make about 80g for the cost of one Chef's Award.

Depending on AH prices you can also try and purchase Crate of Tasty Meat for x2 Chef's Award and sell the meat.

Generally you will want to stick with just getting Cocoa Beans because when you factor in the number of Chef's Awards and meat items Cocoa Beans will still be more profitable.