01 - Pat chicken thighs dry with paper towels. Season both sides generously with salt and black pepper.
02 - Heat olive oil in a large skillet over medium-high heat. Add chicken thighs and sear for 3-4 minutes per side until golden brown. Remove chicken and set aside.
03 - In the same skillet, add minced garlic and sauté for 30 seconds until fragrant.
04 - Pour in apple cider, apple cider vinegar, Dijon mustard, honey, brown sugar, thyme, and cinnamon. Stir thoroughly and bring to a simmer.
05 - Return chicken to the skillet. Reduce heat to medium-low. Cover and cook for 15 minutes, turning chicken halfway through.
06 - Uncover and increase heat to medium-high. Cook for 7-10 minutes, spooning sauce over chicken continuously until sauce reduces to a sticky consistency.
07 - Stir in butter until melted and sauce becomes glossy.
08 - Remove from heat. Garnish with chopped fresh parsley before serving.