1. Preheat oven to 475 degrees with a rack set in the bottom third of oven.

2. Place mushrooms, olive oil, salt, pepper, rosemary, and oregano in a medium bowl; toss to combine. Place mushroom mixture inside a Cameron's hickory smoker bag and fold edges together several times to form a tight seal. Transfer the filled bag to the oven directly on the hot oven rack, taking care to place the correct side down (bag will be marked). Cook until mushrooms have a nice smoky flavor, 10 to 15 minutes.

3. Remove from oven and carefully open bag, as hot steam will escape. Discard herb sprigs and use mushrooms as desired.