Creating Creamy Mushroom Chicken is simple if you follow these straightforward steps:

1. Prepare Ingredients: Gather all the ingredients and chop the onion, garlic, and mushrooms.
2. Heat the Pan: In a large skillet, heat the olive oil and butter over medium heat until melted.
3. Sear Chicken: Season the chicken thighs with salt and pepper. Add them to the skillet and sear for about 5-7 minutes on each side until golden brown. Remove and set aside.
4. Sauté Vegetables: In the same skillet, add the onions and garlic. Sauté until softened, about 3-4 minutes.
5. Cook Mushrooms: Add the sliced mushrooms to the skillet. Cook until tender, usually about 5 minutes.
6. Add Cream: Pour in the heavy cream and add the dried thyme. Stir well to combine and let it simmer for about 2 minutes.
7. Return Chicken: Place the seared chicken thighs back into the skillet and spoon the creamy mixture over them.
8. Simmer: Reduce heat to low and cover the skillet. Let it simmer for 10-15 minutes until the chicken is cooked through.
9. Adjust Seasoning: Taste and adjust the seasoning with more salt and pepper if needed.
10. Garnish and Serve: Once cooked, garnish with fresh parsley before serving.

These steps will guide you in creating this amazing dish without any hassle.