Prepare the Mushrooms: Clean the mushrooms with a damp cloth or rinse briefly, then pat them dry. Halve or quarter them if large.
Heat the Pan: In a large skillet, heat olive oil and butter over medium heat until the butter melts and begins to bubble.
Sauté the Mushrooms: Add the mushrooms to the pan, stirring occasionally. Cook for 5-7 minutes until they release their moisture and start to brown.
Add Garlic and Herbs: Stir in the minced garlic and thyme. Cook for an additional 2-3 minutes, letting the garlic become fragrant without burning.
Season and Garnish: Season with salt and black pepper to taste. Sprinkle with parsley just before serving for a fresh, vibrant finish.