Dry: Lay some paper towels on a sheet pan. Place the wings on the paper towels and pat dry.
Season: Combine the baking powder, salt, garlic powder, onion powder and pepper. Remove the paper towels. Spread the wings in a single layer and sprinkle on all sides with the seasoning.
Refrigerate: Place in the refrigerator uncovered for about 8 hours.
Heat Grill: Heat your grill to 350F degrees with an indirect heat zone.
Gas Grill: To cook on a gas grill, turn half of your grill burners to medium-high heat*. Leave the other half of the burners off. Place the wings skin side down onto the side of the grill that is turned off (the indirect heat). Cook for 15 minutes. Flip and cook for 15 more minutes.
Pellet Grill: Set your grill to 350F degrees. Place the wings skin side down on the upper rack of the grill. Grill for 30 minutes. Flip. Grill for 30 more minutes.
Charcoal Grill: Light your coals. Once they're ashed over, push them to one side of the grill. If you're cooking on a ceramic cooker like a Big Green Egg, add the diffuser plate. Place the wings over indirect heat. Grill for 30 minutes. Flip. Grill for 30 more minutes.
Final Temp: The wings are ready when the internal temperature measures between 195-205F degrees.