Preheat oven to 400 degrees F.
In a small bowl, combine cumin, paprika, chili powder, oregano, garlic powder and onion powder; season with salt and pepper, to taste. Season chicken thighs with spice mixture, rubbing in thoroughly on all sides.
Melt butter in a large oven-proof skillet over medium high heat. Add chicken, skin-side down, and sear both sides until golden brown, about 2-3 minutes per side. Remove from heat and stir in buttermilk.
Place into oven and roast until completely cooked through, reaching an internal temperature of 175 degrees F, about 25-30 minutes.
Serve chicken immediately, garnished with cilantro, if desired. |