**1. Heat the Pan:**
- In a large skillet, heat olive oil and 1 tablespoon of butter over medium-high heat until melted and shimmering.
**2. Cook the Mushrooms:**
- Add the mushrooms to the skillet in a single layer. Let them cook undisturbed for 3-4 minutes to develop a golden-brown crust.
- Stir occasionally and continue cooking for another 5-7 minutes, until the mushrooms are tender and browned.
**3. Add Garlic and Seasonings:**
- Reduce the heat to medium. Add the remaining butter, minced garlic, and thyme to the skillet. Stir well to coat the mushrooms in the garlic butter. Cook for 1-2 minutes until fragrant.
**4. Season and Garnish:**
- Season the mushrooms with salt and pepper to taste. Sprinkle with fresh parsley and stir to combine.
**5. Serve:**
- Serve immediately as a side dish, or use as a topping for steak, chicken, or pasta.