Slow-Cooker Marinated Mushrooms

Total Time

Prep: 15 min. Cook: 6 hours


5 cups

Updated: Oct. 13, 2023
Here's a healthy and delicious addition to any buffet spread. Mushrooms and pearl onions seasoned with herbs, balsamic vinegar and red wine are terrific on their own or alongside a tenderloin roast. —Courtney Wilson, Fresno, California
Slow-Cooker Marinated Mushrooms Recipe photo by Taste of Home


  • 2 pounds medium fresh mushrooms
  • 1 package (14.4 ounces) frozen pearl onions, thawed
  • 4 garlic cloves, minced
  • 2 cups reduced-sodium beef broth
  • 1/2 cup dry red wine
  • 3 tablespoons balsamic vinegar
  • 3 tablespoons olive oil
  • 1 teaspoon salt
  • 1 teaspoon dried basil
  • 1/2 teaspoon dried thyme
  • 1/2 teaspoon pepper
  • 1/4 teaspoon crushed red pepper flakes


  1. Place mushrooms, onions and garlic in a 5- or 6-qt. slow cooker. In a small bowl, whisk remaining ingredients; pour over mushrooms. Cook, covered, on low 6-8 hours or until mushrooms are tender.

Can you freeze Slow-Cooker Marinated Mushrooms?

Freeze cooled mushrooms and juices in freezer containers. To use, partially thaw in refrigerator overnight. Microwave, covered, on high in a microwave-safe dish until heated through, stirring gently and adding a little broth or water if necessary.

Nutrition Facts

1/4 cup: 42 calories, 2g fat (0 saturated fat), 1mg cholesterol, 165mg sodium, 4g carbohydrate (2g sugars, 0 fiber), 1g protein.