Soak wooden bamboo skewers in water for 20 mins so it doesn’t burn or catch fire when cooking.
In a small bowl, mix together the softened butter, dijon mustard, chives, parsley, thyme, grated garlic, lemon zest, lemon juice, smoked paprika, red pepper flakes, salt, and a few cracks of black pepper. Stir until everything is well combined and smooth. Set aside.
In a large bowl, add the cubed chicken breast, olive oil, garlic powder, salt, and a generous amount of freshly ground black pepper. Toss everything together until the chicken is evenly coated with the seasonings.
Take your soaked wooden skewers and thread about 6-7 pieces of chicken onto each one. Leave a little space between each piece so they cook evenly.
Preheat your air fryer to 400°F. Arrange the skewers in a single layer inside the basket (you may need to cook in batches). Air fry for 10–12 minutes, or until the chicken is cooked through and reaches an internal temperature of 165°F. The outside should be lightly golden and slightly crisp.For alternate cooking methods, see recipe notes below. Transfer the cooked skewers to a serving plate. While they’re still warm, generously brush the cowboy butter all over the chicken. Repeat with all chicken skewers. Sprinkle with chopped parsley and serve.