In a mixing bowl, combine the ground coffee, brown sugar, paprika, garlic powder, onion powder, salt, and black pepper. Adjust the quantities of each ingredient to taste, keeping in mind that the coffee should be the dominant flavor.
Mix the ingredients together until well combined. Use a whisk or fork to break up any clumps and ensure even distribution of the spices.
Taste the rub and adjust the seasoning as needed. You can add more sugar for sweetness, more salt for balance, or additional spices for complexity.
Once you're happy with the flavor, transfer the dry rub to an airtight container or jar for storage until ready to use.
To use the dry coffee rub, generously coat the chicken pieces with the rub, making sure to cover all sides. Allow the seasoned chicken to sit for at least 30 minutes to allow the flavors to penetrate the meat.
Prepare your smoker and make sure it's set up for indirect heat cooking. Add your choice of wood chips or chunks to the smoker box or foil packet. For dry cofee rub chicken, fruit woods like apple or cherry are excellent choices as they impart a subtle, sweet flavor that complements the coffee rub. However, you can also use hickory or oak for a stronger, smokier flavor profile. Adjust the amount of wood chips based on your smoker's capacity and desired level of smokiness. Allow the smoker to preheat to the desired temperature, usually around 225-250°F (107-121°C), before adding the chicken. After the chicken has been seasoned, it's ready to be smoked according to your preferred method. Enjoy the deliciously flavorful coffee-rubbed smoked chicken!