Preheat the oven to 400 degrees F.
Add the mushrooms, melted butter, olive oil, salt, pepper, sliced garlic, rosemary sprigs and thyme sprigs to a 9-by-13-inch baking dish. Toss the ingredients together until evenly combined.
Bake until the mushrooms are softened and slightly browned, 30 to 35 minutes. Remove the pan from the oven and discard the rosemary and thyme sprigs.
Serve immediately or keep at room temperature until ready to serve.
Source:
foodnetwork.com