01 -
Preheat oven to 425°F (220°C) and lightly grease a large rimmed baking sheet. Ensure the baking sheet can fit all mushrooms in one even layer.
02 -
Trim the bottoms of mushroom stems and wipe mushrooms clean with a damp paper towel. Cut larger mushrooms in half for even cooking.
03 -
Place mushrooms in a mixing bowl and toss with olive oil until coated. Add salt, pepper, and garlic powder, then toss again to distribute seasonings evenly.
04 -
Spread mushrooms in a single layer on the prepared baking sheet, positioning each mushroom stem side down.
05 -
Bake for 20-25 minutes, removing the baking sheet halfway through to drain accumulated liquid. Return to oven immediately to maintain temperature.
06 -
While mushrooms are roasting, combine melted butter with pressed garlic in a small bowl.
07 -
Once mushrooms are done, transfer to a clean mixing bowl and toss with the garlic butter mixture until evenly coated.
08 -
Serve immediately while hot for best flavor and texture.