If you already have either a gas grill or a charcoal grill with a lid – you can try your hand at BBQ smoking without having to buy a specialized BBQ smoker.
A smoker box is basically a metal box, possibly cast iron, 10 x 6 x 3 inches or there-bouts. They are usually rectangular, but there are wedge-shaped versions that sit with the pointed bottom wedged between the bars of the grill.
The lid is perforated to let the smoke out.
Place your soaked wood chips inside and close the lid. Put the box above your lit charcoal (or lava rocks if you use gas) and close the lid.
Bear in mind that this is an indirect grilling technique and doesn’t work without the lid. The heat source will be at one end of the grill with the smokebox above it, and the meat will be above the other unheated half.
Close the lid. Once the wood chips inside the smoker box heat they will smoke profusely; this will permeate the meat, infusing it with a beautiful taste.
As it smokes it can be basted periodically with any of a variety of BBQ sauces – although you don’t have to do this.
The whole process can take several hours, depending on the size of the cut of meat involved.
But resist the urge to take the lid off for a look unnecessarily – indirect grilling uses lower heat over a longer period of time – it takes 15 minutes plus for the temperature to build up again.
However, the wood chips need replacing about once per hour, so baste the meat at the same time as you do this to save opening the lid too often (thus letting the heat out and increasing the cooking time).
Here’s a detailed video on the subject.
Have a search on Amazon.com for Smoker chips or BBQ wood.