10/21/2026
15-Minute Buttered Balsamic Mushrooms
Serves 4
1 tablespoon olive oil
1 large or 2 small shallots, peeled and finely diced
3 tablespoons unsalted butter, divided
1 pound white or cremini mushrooms, sliced 1/8-inch thick
1/2 teaspoon kosher salt
1/4 teaspoon freshly ground black pepper
1 1/2 teaspoons finely chopped fresh rosemary or thyme leaves
2 tablespoons balsamic vinegar
1 1/2 tablespoons packed light brown sugar
1 tablespoon tamari or soy sauce
3 cloves garlic, finely minced or grated
Heat the oil in a large frying pan over high heat until shimmering, about 15 to 20 seconds. Add the shallots and cook until they begin to soften and brown at the edges, 1 1/2 to 2 1/2 minutes.
Add 2 tablespoons of the butter and stir until melted. Add the mushrooms, salt, pepper, and rosemary or thyme and stir well. Cook, stirring frequently to prevent burning, until the mushrooms have a rich brown color on the edges and some of the sides, and have just begin to release their juices, 3 to 4 minutes.
Reduce the heat to medium-low, add the vinegar, sugar, soy sauce, and garlic. Cook, stirring occasionally, until the mushrooms are soft and tender and the liquid reduces in volume considerably, thickens to the consistency of agave or maple syrup, and coats the mushrooms, 6 to 8 minutes.
Add the remaining 1 tablespoon of butter and stir constantly, allowing the butter to melt completely and coat the mushrooms, until they shine and the sauce is a bit lighter in color, about 1 minute. Serve immediately.
Recipe Notes
Soy sauce substitutes: Steak sauce and Worcestershire sauce are excellent substitutes for the soy sauce.
Dried herbs: Dried herbs work nicely in this recipe. You can use 1/2 teaspoon dried thyme or dried rosemary rather than fresh, but make sure to rub the dried herbs between your fingertips or press to grind in the palm of your hand just before you add them to the mixture, so the fragrance and oils will be released.
Storage: Leftovers can be stored in an airtight container in the refrigerator for up to 5 days.
Enjoy.