Combine salt, garlic powder, red pepper flakes, black pepper, and cayenne in a bowl. Toss chicken to coat. Cover and marinate in the fridge for 4-8 hours.
STEP 2
Set an electric smoker to 275°F (135°C) and keep the top vent closed three hours before cooking.
STEP 3
Place a chicken leg quarter on each of the four racks. Add water to the water pan and add two loads of soaked wood chips according to manufacturer’s instructions.
STEP 4
Smoke chicken until cooked through, about 2 1/2 hours, adding more wood chips hourly. Internal temperature should reach at least 165°F (74°C).