Preheat oven or toaster oven to 400°. Toss clean mushrooms into a plastic bag.
Add olive oil, fresh garlic, fresh chives, salt, and pepper.Gently massage mushrooms and ingredients together (this is how I get the garlic to stick!)
Place in skillet (button-side down) and dust with garlic powder.
Bake 10-12 minutes until sizzling. Serve warm.