Step 1

Preheat the oven to 350 degrees F (175 degrees C). Season both sides of the chicken thighs with salt and pepper.

Step 2

Heat oil in a deep oven-proof skillet or Dutch oven over medium-high heat. Add chicken thighs to the hot oil and cook until browned on both sides, about 4 minutes per side. Transfer chicken to a plate and keep warm.

Step 3

Add sliced onions to the skillet and saute until they just start to brown, about 3 minutes. Pour in apple cider and chicken stock, scraping the bottom of the pan to loosen any browned bits. Stir in thyme and salt. Simmer until the onions are soft, 4 to 5 minutes. Turn off the heat.

Step 4

Add chicken back to the skillet and spoon some sauce over the top. Arrange sliced apples around the chicken. Cover the skillet with a lid or aluminum foil.

Step 5

Bake in the preheated oven for 15 minutes. Remove skillet from the oven and carefully uncover. Transfer chicken from the skillet to a plate and keep warm. Whisk heavy cream and cornstarch together in a small bowl. Stir gently into the sauce in the skillet. Place chicken back into the skillet and spoon some of the sauce over the chicken.

Step 6

Return skillet to the oven and bake, uncovered, until the chicken is no longer pink at the bone and the juices run clear, and an instant-read thermometer inserted near the bone reads 165 degrees F (74 degrees C), about 15 minutes more. Serve chicken and apples with the sauce.