Classic Balsamic Chicken - Big Recipe

Ingredients

• 4 tablespoons balsamic vinegar
• 1 1/2 tablespoons soy sauce
• 1 tablespoon brown sugar
• 2 cloves garlic, minced
• 1/4 teaspoon dried thyme
• 4 chicken thighs, boneless and skinless
• salt, to taste
• black pepper, to taste
• 1 tablespoon olive oil
• 1 (8-ounce) package mushrooms, halved
• 2 tablespoons butter
• fresh thyme, optional, to taste, for garnish