Grilled Portobello Mushrooms

Ingredients

• 4 largeportobello mushrooms
• 60 ml (¼ cup)balsamic vinegar
• 60 ml (¼ cup)olive oil
• 2.5 ml (½ teaspoon)garlic powder
• 2.5 ml (½ teaspoon)salt
• 1.25 ml (¼ teaspoon)black pepper

Instructions

1. 1

   Heat the grill

   Preheat the grill to 175–200°C (350–400°F).

2. 2

   Prepare mushrooms

   Wipe the mushrooms clean with a damp cloth or paper towel. Remove the stems, and, if you prefer, gently scrape out the gills with a spoon.

3. 3

   Mix the dressing

   Whisk the balsamic vinegar, olive oil, garlic powder, salt and black pepper together in a small bowl.

4. 4

   Brush the caps

   Brush the balsamic mixture over both sides of each mushroom cap.

5. 5

   Grill the mushrooms

   Set the mushrooms on the grill with the gill side facing down. Cook for 4–5 minutes per side, until tender and lightly charred.

6. 6

   Serve hot

   Take the mushrooms off the grill and serve while hot.

What are grilled portobello mushrooms?

Portobellos are large, mature mushrooms with broad caps that hold up well to grilling. In this American-style preparation, a balsamic and garlic dressing adds tang and savoury flavour while the grill brings out a smoky edge.

The recipe works because the caps are substantial enough to turn and serve whole. They can stand in a burger bun, top pasta or make a simple centrepiece for a meat-free meal.

Nutrition and macros by portion

The nutrition label shows one serving as written: 153 calories, 2g protein, 6g carbs, 14g fat.

The mushrooms contribute some carbohydrate and protein, while most of the fat comes from the olive oil. The balsamic vinegar also contributes to the carbohydrate total. To balance the plate, serve a cap with vegetables and a portion of a filling grain or pasta.

Choosing and preparing the mushrooms

Size: Choose four large caps that are fairly even in thickness so they cook at a similar pace. Wipe away any dirt rather than soaking them, which can make them harder to brown.

Gills: The gills are edible, but they have a softer texture and can darken the dressing. Scrape them out gently if you would rather have a cleaner-looking cap.

Making the balsamic dressing

Balance: Whisk the vinegar with the olive oil, garlic powder, salt and pepper until combined. The oil helps coat the mushrooms, while balsamic brings a sweet-sour note.

Coating: Brush both sides of each cap so the flavour reaches the gills as well as the top. Give the dressing another quick whisk if the oil and vinegar begin to separate.

Grilling for tender caps

Heat: Preheat the grill to 175–200°C before adding the mushrooms. A ready, hot grill helps the caps start cooking promptly and develop light char.

Position: Begin with the gill side down, then turn after 4–5 minutes. The mushrooms are ready when tender and lightly charred; use those cues alongside the stated cooking time.

Serving ideas

Burgers: Put a grilled cap in a bun with your preferred burger toppings. Its broad shape makes it easy to serve as the main filling.

Sides: Serve the mushrooms with pasta or alongside vegetables and a grain. Their tangy dressing pairs well with simple, mild accompaniments.

Timing and texture

The stated total time is 20 minutes, including preparation and grilling. Keep an eye on the caps as they cook, since their thickness and the grill's heat can affect how quickly they become tender.

Aim for a tender centre and light char rather than leaving the mushrooms on the grill until they collapse. Turning them once helps cook both sides evenly.

Recipe notes & tips

• Choose caps of similar size so they are easier to grill for the same length of time.
• Wipe the mushrooms clean instead of rinsing or soaking them.
• Scrape out the gills gently if you prefer a firmer texture or a neater appearance.
• Brush both sides thoroughly so the caps are evenly coated.
• Whisk the dressing again if the oil and vinegar separate before brushing.
• Check for tenderness and light char as well as following the cooking time.

Variations

• Add fresh herbs: Scatter chopped parsley over the mushrooms just before serving.
• Make it peppery: Add extra black pepper to the dressing before brushing.
• Add chilli: Mix a little chilli powder into the balsamic dressing for gentle heat.
• Serve as burgers: Tuck each grilled cap into a bun with your preferred toppings.
• Pair with pasta: Slice the cooked mushrooms and serve them over pasta.

Common mistakes to avoid

• Soaking the mushrooms: They can take on extra water; wipe them clean with a damp cloth instead.
• Skipping the gill side: Brush both sides so the dressing coats the full cap.
• Grilling before the grill is hot: Preheat it to 175–200°C before adding the mushrooms.
• Turning too early: Let the first side cook for 4–5 minutes before turning.
• Overcooking the caps: Check for tenderness and light char, then remove them from the grill.

How to store

Refrigerate leftover mushrooms in a covered container and use within 3–4 days. Reheat in a pan or on the grill until hot; they can also be served cold, sliced into a salad or sandwich.

Frequently asked questions