Preheat the oven to 425°F (220°C).
Pat the chicken thighs dry. Season both sides with salt, black pepper, smoked paprika, and garlic powder.
Heat the olive oil in a large cast-iron or oven-safe skillet over medium heat.
Once the skillet is hot, add the chicken thighs. Sear for 2–3 minutes without moving them, or until the first side develops a deep golden crust.
Flip the chicken and sear the second side for another 2–3 minutes.
In a small bowl, whisk together the apple cider, honey, and water.
Pour the apple cider mixture into the skillet around the seared chicken. Allow it to bubble and gently simmer for 1–2 minutes.
Transfer the skillet to the preheated oven. Bake for 10–12 minutes, or until the thickest part of the chicken reaches an internal temperature of 165°F (74°C).
Remove the skillet from the oven and let the chicken rest for about 10 minutes. Spoon plenty of the sticky apple cider sauce over the chicken before serving.
While the chicken cooks, prepare the autumn slaw. Combine the apple matchsticks, celery, red onion, and grated carrot in a large bowl. Season lightly with salt and black pepper.
In a separate small bowl, whisk together the mayonnaise, apple cider vinegar, honey, minced garlic, and another small pinch of salt and pepper.
Pour the dressing over the apple mixture and toss until everything is evenly coated.
Serve the Sticky Apple Cider Chicken with Autumn Slaw alongside the freshly prepared slaw, spooning additional glaze over the chicken as desired.