Being a fan of Alton Brown, I have always wanted to make his Terracotta Flower Pot Smoker featured on the "Q" episode. The required items include:
- One large terracotta pot approx 17 inches in diameter at the top. This is the base of the smoker.
- One circular terracotta pot that fits on top of the base pot
- Grill grate that will fit into the large pot and hold the food
- Grill thermometer
- Feet for the large terracotta pot so it stands off the ground. (pair of 2x4's, bricks, decorative pot stands, etc)
- Hot plate for the heat source
- Heavy duty metal tin for wood chips/chunks
The end result, will look similar to this:

Note: My top is not a circular terracotta pot, but rather a terracotta plate. See issue #1:

Overall, it worked out pretty well. I am able to hold a temperature up to 250 degree F, or lower if I turn down the hot plate a bit. My "test case" was a rack of ribs with a traditional Bobby Flay spicy rub with a sweet sauce. I smoked them for about 3.5 hours, which was a little too long I think. They were a bit on the dry side, but they still tasted good and the novelty made it all worth while

Next up is a whole chicken or maybe a Boston Butt. The Boston Butt is a ~10 hour investment, so that will have to wait for a lazy football weekend which is at least two-weeks out.
While the smoker build-out was pretty smooth and successful, I did run into a few issues that I will have to workout eventually.
Issue #1
After a trip to home depot, I found everything but the round pot to serve as the top, and the hot plate. After a trip to OSH and a nursery, I found a hot plate, but no round pots; all the round pots were too small or had a glaze that would probably end up killing me. Others have reported using the same size pot for the pot and the base, but many hot plates cannot heat this large an area. As a workaround, I picked up a large terracotta plate that would fit on top of the pot.
The issue with the plate is that there is no hole for the thermometer. Yet another trip to home depot solved this. I picked up some masonry drill bits for ~$10 and drilled enough holes for the thermometer to fit in.
PS: Save yourself some time and
only go to OSH. They should have everything you need.
Issue #2
The grill grate is difficult to pull out. This is a must when you need to replace the wood chips. I need to find one with handles, or invent some handles on my grate. Either way, I recommend taking off the food before taking out the grate. My ribs almost ended up on the ground.
Issue #3
I could use a little more space for the meat. Getting more than 2 racks of ribs might be difficult unless I stand them on their side. (The picture above is one rack cut in half.) If I find a grate with an extra inch or two in diameter, I might be able to have a dual grate smoker.
Issue #4
I turned down the extended warranty on the hot plate. I doubt it was designed to run 10 hours at a time, so it will be interesting to see how it fares during my future Boston Butt smoking experiment. Considering the hot plate was $10, the warranty probably would have been $1-$2!!!
Issue #5
The lid can get very hot to the touch. Since I was able to drill holes in the plate for the thermometer, I should be able to drill some holes for a handle.