Charcoal-Grilled Portobello Mushrooms with Balsamic Glaze

By AislePrompt Editorial · Published 2026-05-28 · Updated 2026-05-28

Meaty portobello mushrooms grilled over charcoal and finished with a tangy balsamic glaze for a rich, umami-packed vegetarian main. This grilling recipe (vegetarian), ready in about 30 minutes, pairs 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 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.

Ingredients

• 4 large portobello mushroom caps
• 4 tbsp olive oil
• 1/3 cup balsamic vinegar
• 1 tbsp brown sugar
• 2 garlic cloves, minced
• 1 tsp salt
• 1/2 tsp black pepper
• 1 tsp fresh thyme leaves

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Instructions

1. Step 1: In a small saucepan, combine 1/3 cup balsamic vinegar and 1 tbsp brown sugar. Bring to a simmer over medium heat and cook for 8-10 minutes, stirring occasionally, until the mixture thickens to a syrupy consistency. Remove from heat and set aside.
2. Step 2: Clean 4 large portobello mushroom caps and remove stems. Brush both sides generously with 4 tbsp olive oil, then sprinkle 1 tsp salt, 1/2 tsp black pepper, and 1 tsp fresh thyme leaves evenly over them.
3. Step 3: Preheat charcoal grill to medium heat with hot embers and grill the mushrooms gill side down for 5 minutes. Flip and grill for another 4-5 minutes until tender and smoky.
4. Step 4: Remove mushrooms from grill and brush with the prepared balsamic glaze on both sides. Let rest for 3 minutes before serving.