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Portabella Mushrooms with Balsamic Marinade—grilled or sautéed

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I saw these gorgeous Portabella mushrooms at Costco and it inspired me to make these easy, fresh and delicious mushrooms.

I sautéed them in a pan, but in summer just throw them on the grill for a healthy side.


Only $4.79 for 4 at Costco

Marinated Portabella Mushrooms

You can add 1/2 teaspoon of dried thyme or dried basil to the marinate if you’re a fan of herbs.

I like to serve them with balsamic vinegar and olive oil or balsamic vinaigrette for the extra lettuce once I’ve eaten my share of the mushrooms!

Nutritional Info for 1 mushroom with 1 cup of greens

calories 60

fat 3g

carb 7g

protein 3g

2 Weight Watchers PointsPlus values for 1 mushroom with 1 cup of greens

Weight Watchers Power Food

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Portabella Mushrooms with Balsamic Marinade

Prep Time 10 minutes
Cook Time 10 minutes
Total Time 20 minutes
Servings 4


  • 4 large Portabella mushrooms stems discarded
  • 2 tablespoons balsamic vinegar
  • 2 teaspoons extra virgin olive oil
  • 1 clove garlic minced
  • 1 tablespoon soy sauce use low sodium if required
  • about half a 1 lb bag mixed greens recommended: Trader Joe's Butter Lettuce with Radicchio olive oil cooking spray


  • Whisk balsamic vinegar, garlic, soy sauce and oil together in a measuring cup.
  • Place mushrooms in a gallon ziplock bag; pour sauce over and distribute evenly over mushrooms, expelling air before closing.
  • Marinate in fridge 1 - 3 hours (or at room temperature for 1/2 hour), turning frequently.

To Saute

  • Remove mushrooms from sauce; discard sauce. Slice mushrooms into 1-inch thick pieces.
  • Spray a 12-inch non-stick sauté pan with olive oil cooking spray.
  • Saute mushroom slices over medium-high heat, stirring often, until cooked through, about 10 - 15 minutes.
  • Lay immediately over mixed greens, sprinkle with fresh ground black pepper and a little salt to taste. (Try one first to see if it needs salt.)
  • Serve warm over mixed greens.

To Grill

  • Grill caps on grill rack coated with cooking spray for about 10 minutes turning once halfway.
  • Slice each mushroom into 4 pieces; serve warm over mixed greens.

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