Step 1

Preheat the oven to 400 degrees F (200 degrees C).

Step 2

Clean mushrooms with a damp paper towel and gently remove and discard stems.

Step 3

Drizzle oil into a large cast iron skillet to evenly coat. Place mushrooms into the skillet, cap-side down. Carefully sprinkle garlic into the mushroom cavities, taking care not to sprinkle directly into the skillet. Drizzle mushrooms with melted butter, then season with salt and pepper.

Step 4

Roast in the preheated oven for 15 minutes. Sprinkle with Parmesan cheese and return to the oven for 3 to 5 more minutes. Remove from the oven and sprinkle with parsley. Let cool slightly before serving.