Balsamic Portobello Mushrooms with Marjoram are meaty, glossy, and deeply savory – the kind of dish that makes mushrooms the main event. Portobellos sizzle with garlic, marjoram, balsamic vinegar, and tamari in a little oil or spread until the edges caramelize. It's fast enough for a weeknight and good enough for company.
Did you know that the mighty portobello is simply a grown-up cremini mushroom? Known as “big hats” in Italy, these fungi are celebrated for their deep, meaty texture and rich, savory flavor. This recipe transforms them into an elegant side dish or a spectacular topping for toast, pasta, or grains. With a simple combination of earthy marjoram, pungent garlic, and a tangy balsamic-tamari glaze, these mushrooms are a testament to how simple ingredients can create something truly special.
Ingredients
• Makes 3 cups / 750 mL
• 3 large portobello mushrooms, about 6 cups (1440 ml) / 1.5 L sliced
• 1 to 2 tablespoons / 15 to 30 mL (1 fl oz) Earth Balance spread, coconut oil, or olive oil
• 1 teaspoon / 5 mL (0.2 fl oz) dried marjoram
• 2 cloves garlic, minced
• 1 tablespoon / 15 mL (0.5 fl oz) balsamic vinegar
• 1 tablespoon / 15 mL (0.5 fl oz) tamari or soy sauce
Instructions
1. Prepare the mushrooms: Carefully remove the stems from the mushroom caps. Cut the stems in half lengthwise, then cut into 1/4-inch / 5 mm thick slices. Cut each mushroom cap into three equal pieces, then cut each piece into 1/4-inch / 5 mm thick slices.
2. Sauté the mushrooms: Heat the oil or spread in a large skillet over medium heat. Add all the mushroom pieces and the dried marjoram. Cover and cook for 4 minutes.
3. Add aromatics: Add the minced garlic and cook for 1 minute, stirring occasionally until fragrant.
4. Finish the dish: Remove the skillet from the heat and immediately stir in the balsamic vinegar and tamari, tossing to coat the mushrooms completely.
Nutritional Information
• Per 1 cup / 250 mL serving
• Calories: 66
• Protein: 3 g
• Fat: 4 g
• Carbohydrate: 6 g
• Sodium: 347 mg
• Potassium: 435 mg
Pro Tips
• For the best texture, avoid washing mushrooms under water. Instead, wipe them clean with a damp paper towel to prevent them from becoming soggy.
• Don’t overcrowd the skillet. Cook the mushrooms in batches if necessary to ensure they sauté and brown properly rather than steam.
• Add the balsamic vinegar and tamari off the heat. This prevents the sugars from burning and allows the residual heat of the pan to create a perfect, glossy glaze.
• If using fresh marjoram, use about 1 tablespoon (15 ml / 0.5 fl oz) and stir it in with the garlic during the last minute of cooking for the freshest flavor.
FAQ
Q: How can I make this portobello mushroom recipe a high-protein meal
A: To transform this dish into a complete high-protein vegetarian meal, serve the mushrooms over a bed of quinoa or whole-wheat pasta. You can also top them with toasted nuts like walnuts or pine nuts, or serve alongside a portion of pan-fried tofu or tempeh.
Q: Is there a soy-free alternative to tamari for this recipe
A: Absolutely. For a soy-free version, you can use coconut aminos instead of tamari or soy sauce. It provides a similar savory and slightly sweet flavor profile that works beautifully in the glaze.
Q: How do I store leftover balsamic portobello mushrooms
A: Store any leftover mushrooms in an airtight container in the refrigerator for up to 3-4 days. They can be enjoyed cold in salads or gently reheated in a skillet or microwave. The texture may soften slightly upon reheating.
Q: Can I use a different herb instead of marjoram
A: Yes, if you don’t have marjoram, you can easily substitute it with dried thyme or oregano. Both herbs have an earthy flavor that complements the mushrooms and balsamic glaze well. Use the same amount as called for in the recipe.
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Balsamic Portobello Mushrooms with Marjoram
Ingredients
Method
- Prepare the mushrooms: Carefully remove the stems from the mushroom caps.
- Cut the stems in half lengthwise, then cut into 1/4-inch / 5 mm thick slices.
- Cut each mushroom cap into three equal pieces, then cut each piece into 1/4-inch / 5 mm thick slices.
- Sauté the mushrooms: Heat the oil or spread in a large skillet over medium heat.
- Add all the mushroom pieces and the dried marjoram.
- Cover and cook for 4 minutes.
- Add aromatics: Add the minced garlic and cook for 1 minute, stirring occasionally until fragrant.
- Finish the dish: Remove the skillet from the heat and immediately stir in the balsamic vinegar and tamari, tossing to coat the mushrooms completely.
- Don't overcrowd the skillet.
- Cook the mushrooms in batches if necessary to ensure they sauté and brown properly rather than steam.
- Add the balsamic vinegar and tamari off the heat. This prevents the sugars from burning and allows the residual heat of the pan to create a perfect, glossy glaze.
