Season your chicken thighs with plenty of salt and pepper. Make sure to coat both sides of the meat well.
Heat oil in your large skillet over medium-high heat. Place the chicken skin-side down in the hot pan.
Sear the chicken until the skin is golden and crispy. This should take about five to seven minutes total.
Remove the chicken from the pan and set aside. Keep the fat in the pan for the next step.
Add the sliced mushrooms and shallots to the same skillet. Sauté them until they are soft and lightly browned.
Stir in the minced garlic and fresh thyme sprigs. Cook for one minute until you smell the garlic.
Pour the dry white wine into the hot skillet. Scrape the bottom of the pan to release the flavor.
Let the wine reduce by half over medium heat. This removes the harsh alcohol taste from the sauce.
Pour in the chicken stock and bring to a simmer. Add the chicken thighs back into the pan carefully.
Cover the pan and cook for fifteen more minutes. Ensure the chicken is cooked all the way through.
Stir in the heavy cream and a knob of butter. Let the sauce thicken for two minutes without a lid.