Clean mushrooms with a damp cloth. Cut large mushrooms into quarters and smaller mushrooms in half.

Place mushrooms in the air fryer basket, spray with avocado oil, and add a pinch of salt. Air fry at 400 degrees Fahrenheit for 8 minutes, shaking the basket halfway through for even cooking.

In a mixing bowl, combine balsamic vinegar, dried thyme, dried rosemary, and minced garlic.

Transfer air-fried mushrooms to the mixing bowl, add another light spray of avocado oil, and use a large spoon to combine with the vinegar mixture.

Transfer the mushrooms back to the air fryer. Air fry for an additional 2 to 4 minutes, until golden brown and slightly crisp on the edges.

Once done, transfer to a serving dish. Taste, and add an additional pinch of salt, if needed, before serving.