Get out and measure all of your ingredients.
Prepare the chicken by placing breast side down.
Cut through and discard the backbone.
Then, flip the chicken.
Split in half lengthwise through the breastbone.
Cut slits across the legs, thighs, and breasts about ½-inch deep and ½-inch apart.
Prepare the bourbon glaze by combining the bourbon, soy sauce, dark brown sugar, shallots, garlic, and ground black pepper in a medium sized saucepan over medium heat.
Bring to a boil and cook for about 1 minute before removing from heat and allowing to cool.
Set aside ¾ cup of the bourbon glaze for basting the chicken.
Place the chicken halves in a large sealable container, like a Rubbermaid, and pour the remaining bourbon glaze over the chicken. Allow to marinate in the fridge for at least an hour, preferably overnight, flipping the chicken occasionally to allow the glaze to marinate the entire chicken.
When ready to smoke, remove the chicken from the container and pat dry, discarding the used bourbon glaze.
Place chicken inside your smoker.
Cook the chicken at 225 degrees Fahrenheit for 5 hours, basting the chicken with the remaining ¾ cups of bourbon glaze, every 20 minutes or so.
Until the chicken reaches 170 degrees Fahrenheit.
Remove from smoker and place on cutting board or tray.
Allow your chicken to rest 15 - 20 minutes
Serve.
Enjoy every bite.