Start your smoker up with the water and wood pucks to get a good smoke rolling and going before putting in your chicken.
Spray your smoking rack with a nonstick spray or rub with oil.
Chop up your celery, leeks, and green onion into stalks that are about the same length, this will be a smaller size than they are bought.
Take your twine and tie a combination of the three into bundles that will fit to stuff hens. Note you won't be eating these, this is to keep the meat moist while smoking. I have an obsession with spreading things out on a cutting board, this helps me to also see if we have everything together.
Make garlic butter by taking a slab of cold butter, I started with 4 tbsp butter and added, and mix with minced garlic. Or just keep throwing slabs of butter into the bowl till you get the consistency you want or amount.
Scoop premade garlic butter or scoop your garlic butter blend into balls that will fit into the cornish game hens, you can make these any size I used a Wilton cookie scoop.
Hold your hen open and stuff posterior of the bird with a garlic butterball, add more minced garlic, and then shove in a bundle of the green mixture.
It can be helpful to stand them on the upper end of the hen for this part.
Place your breast side down chicken on the racks in the smoker. Keep your smoker at about 225 degrees and smoke for about 3 ½ hours.
Place breast side down chicken on the racks in the smoker, or on the thickest part of the breast.
Keep your smoker at about 225 degrees or medium heat or medium-high heat on the grill, it is important to cook them on indirect heat. A higher temperature will allow for fast cooking of the hens but medium low heat with indirect cooking will allow for juicy meat and smoky flavor.
Keep an eye on the temperature of the smoker and use a meat thermometer to check the internal temperature of the meat. Do not remove until the internal temperature reaches 165 degrees.
The cook time for mine was about 3 ½ hours but cook for temperature, not time