Creating Mushroom White Wine Chicken is a straightforward process if you follow these steps:

1. Prepare the Chicken: Season both sides of the chicken breasts with salt and pepper.
2. Heat the Oil: In a large skillet, heat the olive oil and butter over medium-high heat until hot.
3. Cook the Chicken: Add chicken breasts to the skillet. Cook for about 6-7 minutes per side until golden brown and cooked through. Remove the chicken and set aside.
4. Sauté the Onions and Garlic: In the same skillet, add the chopped onion and sauté for about 2-3 minutes until translucent. Add the minced garlic and cook for another minute.
5. Add the Mushrooms: Stir in the sliced mushrooms and cook until they are tender and browned, about 5-7 minutes.
6. Deglaze with Wine: Pour in the white wine, scraping the bottom of the skillet to release any brown bits. Bring to a simmer and let it reduce by half.
7. Add Chicken Broth and Thyme: Stir in the chicken broth and dried thyme. Return the chicken breasts to the skillet.
8. Simmer: Reduce the heat to low and cover the skillet. Let everything simmer for 10-15 minutes, allowing the flavors to meld.
9. Adjust Seasoning: Taste the sauce and adjust seasoning with additional salt and pepper if needed.
10. Garnish and Serve: Remove from heat, garnish with fresh parsley, and serve hot.

These simple steps will guide you to creating an incredible Mushroom White Wine Chicken that is sure to impress anyone at the table.