Season the chicken with salt and pepper. Heat a skillet with oil over medium heat and sear the chicken for 4-5 minutes per side until golden brown. Remove and set aside.
Add butter to the same skillet and sauté the mushrooms for 5 minutes until soft and browned.
Stir in minced garlic and cook for another 30 seconds until fragrant.
Pour in the heavy cream and bring to a gentle simmer, stirring until the sauce thickens.
Return the chicken to the skillet, spoon the sauce over the top, and let it cook for 5 more minutes until heated through.
Serve hot, garnished with fresh herbs if desired. Enjoy!