Step 1: Load the Slow Cooker with the Wings - Add the chicken wings to an 8 quart slow cooker, spreading them out as evenly as you can so they cook evenly.
Step 2: Whisk Together the Sweet and Smoky Sauce - In a small bowl, add the ketchup, honey, adobo sauce, apple cider vinegar, salt, pepper, onion powder, and garlic powder. Stir until everything is well combined and smooth.
Step 3: Coat the Wings in Half the Sauce - Pour half of the sauce over the wings in the slow cooker and gently toss or spread it around so every wing gets coated. Save the remaining sauce for later.
Step 4: Let the Slow Cooker Do the Work - Cover and cook on high for 4 hours or until the wings are very tender and starting to pull away from the bone.
Step 5: Transfer the Wings and Brush with Extra Sauce - Once the wings are done, carefully transfer them to a foil lined baking sheet. Brush the remaining sauce generously over the wings.
Step 6: Broil for That Sticky Caramelized Finish - Place the wings under the broiler for 3 to 4 minutes until the sauce bubbles and caramelizes on top. Keep a close eye on them so they do not burn.
Step 7: Finish with a Little Freshness and Serve - Sprinkle parsley on top if you like, then serve warm and enjoy every sticky bite.