Preheat oven to 400°F (200°C).
Lightly grease a large baking sheet/pan with nonstick cooking oil spray.
Wipe mushrooms over with a damp sheet of paper towel to clean off dirt and debris.
In a large bowl, combine the mushrooms with the melted butter, oil, balsamic vinegar, soy sauce, garlic, parsley, thyme, brown sugar, salt and pepper. Toss to evenly coat.
Arrange mushrooms in a single layer on prepared baking sheet.
Roast in hot oven for 15-20 minutes, mixing them halfway through cooking, until tender.
Enjoy!
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