1. 1. Heat a skillet over medium heat.

2. 2. Add button mushrooms to the skillet and cook until they start to brown, about 5-7 minutes.

3. 3. Pour balsamic vinegar over the mushrooms and stir well to coat.

4. 4. Continue cooking for another 2-3 minutes until the mushrooms are tender and glazed with the balsamic vinegar.

5. 5. Season with salt and pepper to taste.

6. 6. Serve hot as a tasty appetizer or side dish.