Charcoal-Grilled Portobello Mushrooms with Balsamic Glaze and Garlic Herb Butter

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

Meaty portobello mushroom caps grilled over charcoal for a smoky flavor, finished with a drizzle of balsamic glaze and a dollop of fragrant garlic herb butter. This mediterranean-inspired grilling (vegetarian) ready in about 25 minutes pairs large portobello mushroom caps, olive oil, salt for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 180 calories and feeds 4, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 10 min Cook: 15 min Serves 4 Mediterranean cuisine 180 cal/serving
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Ingredients

Instructions

  1. Step 1: Preheat charcoal grill until medium-hot with glowing coals and some ash, about 400°F. Clean grill grates well.
  2. Step 2: In a small saucepan, combine 1/4 cup balsamic vinegar and 2 tbsp brown sugar. Bring to a gentle boil over medium heat and simmer for 6-8 minutes until reduced by half and syrupy. Remove from heat and set aside.
  3. Step 3: Brush 4 large portobello mushroom caps on both sides with 3 tbsp olive oil, and season with 1 tsp salt and 1/2 tsp black pepper. Place mushrooms on grill, gill side down first, and cook for 5 minutes.
  4. Step 4: Flip mushrooms and grill for another 4-5 minutes until tender and smoky with grill marks.
  5. Step 5: While mushrooms cook, mix 4 tbsp softened unsalted butter with 2 minced garlic cloves, 1 tbsp finely chopped fresh parsley, and 1 tsp finely chopped fresh thyme until combined.
  6. Step 6: Remove mushrooms from grill and immediately top each with 1 tbsp garlic herb butter, letting it melt. Drizzle 1-2 tbsp balsamic glaze over each mushroom before serving to add a sweet tangy finish.

Equipment for this recipe

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Frequently asked questions

How long does Charcoal-Grilled Portobello Mushrooms with Balsamic Glaze and Garlic Herb Butter take to make?

Total time is about 25 minutes (10 min prep + 15 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.

How do I store leftover Charcoal-Grilled Portobello Mushrooms with Balsamic Glaze and Garlic Herb Butter?

Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep olive oil from drying out.

Can I substitute ingredients in Charcoal-Grilled Portobello Mushrooms with Balsamic Glaze and Garlic Herb Butter?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Charcoal-Grilled Portobello Mushrooms with Balsamic Glaze and Garlic Herb Butter for a different number of people?

The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

Is Charcoal-Grilled Portobello Mushrooms with Balsamic Glaze and Garlic Herb Butter vegetarian?

Yes — this recipe is tagged vegetarian based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.

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