Wash, dry, and slice the mushrooms into roughly even slices.
Peel and crush or mince your garlic.
Melt the butter over medium heat and add in the garlic.
Sautee the garlic for about 1 to 2 minutes or until the garlic starts to become fragrant.
Add in the mushrooms, white wine, balsamic vinegar, salt, and pepper.
Stir frequently and cook until the the liquids thicken and the mushrooms have shrunk in size and have a dark brown color to them (about 8 to 10 minutes).