Charcoal-Grilled Portobello Mushrooms with Balsamic Glaze and Garlic

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

Meaty portobello mushrooms grilled over charcoal and brushed with a savory garlic balsamic glaze for a rich vegetarian main. This vegetarian-inspired grilling (vegetarian) ready in about 30 minutes pairs caps large portobello mushroom caps, olive oil, balsamic vinegar for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 120 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: 15 min Cook: 15 min Serves 4 Vegetarian cuisine 120 cal/serving
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Ingredients

Instructions

  1. Step 1: In a small saucepan over medium heat, combine 1/3 cup balsamic vinegar, 1 tbsp brown sugar, 2 minced garlic cloves, and 1 tsp fresh thyme leaves. Simmer gently for 8-10 minutes until the mixture reduces by half and thickens into a syrupy glaze. Remove from heat and set aside.
  2. Step 2: Clean 6 large portobello mushroom caps and remove stems. Brush both sides with 4 tbsp olive oil and season with 1 tsp salt and 1/2 tsp black pepper.
  3. Step 3: Preheat a charcoal grill to medium heat, about 400°F, with glowing coals and no visible flames.
  4. Step 4: Place mushrooms on the grill, cap side down, and cook for 5 minutes until grill marks appear. Flip and brush generously with 2 tbsp soy sauce and 2 tbsp of the balsamic glaze. Grill for another 4-5 minutes until tender and juicy.
  5. Step 5: Remove mushrooms from the grill and brush with remaining balsamic glaze and 2 minced garlic cloves for an extra punch. Serve hot as a vegetarian entrée or side dish.

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Frequently asked questions

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

Total time is about 30 minutes (15 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?

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?

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 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 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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