Sauteed Balsamic Portobello Mushrooms (Easy Side)

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Savory, simple, and packed with flavor, these balsamic sautéed mushrooms are the kind of side dish that makes any meal feel a little more special. Meaty portobello mushrooms are cooked until tender, then finished with a splash of balsamic vinegar that adds a tangy sweetness.

Prep time: 5 minutes
Cook time: 8 to 10 minutes
Servings: 2 to 4
Prep level: Beginner +

Things I Like About This Recipe

Bold flavor with simple ingredients – With just a handful of ingredients and a few minutes on the stovetop, it’s one of my favorite ways to serve mushrooms.
Quick and easy to make – This dish comes together in about 15 minutes, making it a great recipe for busy weeknights or a last-minute side.
Pairs with almost anything – These sauteed mushrooms are delicious alongside beef pinwheels, chicken, pork, pasta, or even spooned over mashed potatoes or piled high onto burgers.

Laura’s Ingredient Notes

Fresh mushrooms, garlic, herbs, and seasonings on a white surface.

Mushroom variety: Portobello mushrooms have a meaty texture, making them great for sautéing. Baby Bella mushrooms or white mushrooms also work well.
Olive oil and unsalted butter: Help the mushrooms sauté and add richness. You can substitute avocado oil or another neutral cooking oil. If needed, you can use salted butter; just reduce the amount of added salt.
Shallot: Brings a mild, slightly sweet onion flavor to the balsamic mushrooms. If you don’t have one on hand, use a few tablespoons of any onion.
Fresh garlic cloves: Adds bold flavor and aroma. In a pinch, 1/2 teaspoon garlic powder per clove can be used.
Thyme: Adds a warm, earthy flavor that pairs perfectly with mushrooms and balsamic vinegar. I use what I have on hand, either fresh or dried (about 1 tablespoon fresh for every 1 teaspoon dried).
Balsamic vinegar: The star ingredient that gives the mushrooms their signature tangy, slightly sweet flavor. For a deeper flavor, try aged balsamic vinegar or balsamic reduction (often labeled balsamic glaze). Soy sauce can be used in a pinch.
Freshly grated Parmesan cheese (optional): A salty finish that complements the balsamic vinegar. Pecorino Romano or Asiago are great alternatives. For a dairy-free version, simply leave out the cheese.

Delicious sautéed portobello mushroom slices garnished with garlic and herbs in a black bowl.

Step-by-Step Instructions

Sliced portobello mushrooms with herbs, garlic, and onions on a wooden cutting board.

Prep the vegetables and herbs – Clean and slice mushrooms, finely chop the shallot, mince the garlic, and herbs.

Melted butter and oil in a cast-iron skillet.

A close-up of chopped garlic and shallots cooking in oil and butter in a cast iron skillet.

Place a large cast-iron skillet over medium-high heat. Add the oil and butter. Once the butter is melted and frothy, add the chopped shallot and cook until softened. Stir in the minced garlic and cook briefly, just until fragrant.

Sliced mushrooms with seasonings cooking in a cast iron skillet.

Sautéed mushrooms with garlic and onion in a cast iron skillet.

Add the sliced mushrooms to the skillet. Spread them out in an even layer. Sprinkle in the dried thyme, salt, and pepper. Cook, stirring occasionally, scraping any brown bits from the bottom of the pan, until the mushrooms release their moisture and begin to turn golden.

Sautéed mushrooms in garlic, herbs, and olive oil, cooked in a cast iron skillet.

Reduce the heat to medium and pour in the balsamic vinegar. Stir until the mushrooms are lightly coated. Remove the skillet from the heat and sprinkle with fresh chopped parsley and freshly grated parmesan cheese (if using).

Please take a look at the recipe card below for ingredient amounts and cooking time.

Sautéed portobello mushrooms with garlic, herbs, and olive oil in a black bowl.

FAQ’s

How do you clean portobello mushrooms?

The best way to clean mushrooms is to gently wipe them off with a damp paper towel or soft brush. Avoid soaking the mushrooms in water, as they absorb moisture and can become soggy when cooked.

Do I need to remove the gills from portobello mushrooms?

The dark gills underneath the mushroom cap are completely edible, so removing them is optional. To remove the gills from portobello mushrooms, start by snapping or twisting off the woody stem. Hold the mushroom cap in your palm and use a spoon to gently scrape along the underside, removing the gills while leaving the firm flesh intact.

How do I store leftovers?

Store leftover mushrooms in an airtight container in the refrigerator for up to 3-4 days.

How do I reheat sautéed mushrooms?

For best results, reheat mushrooms in a skillet over medium heat until warmed through. You can microwave them in short intervals, but they may become soggy.

Yield: 2 to 4