Baked Portobello Caps with Basil and Garlic

By , Test Kitchen Director · Reviewed by AislePrompt Editorial · ·

Earthy portobello mushrooms baked with garlic and fresh basil until tender, creating a satisfying vegetarian main with minimal prep. This american-inspired vegetarian (low carb, keto) ready in about 32 minutes pairs olive oil, minced garlic, fresh, finely chopped basil for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 200 calories and feeds 2, 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: 22 min Serves 2 American cuisine 200 cal/serving
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Ingredients

Instructions

  1. Step 1: Preheat oven to 400°F (200°C). Place 2 portobello mushrooms on a baking sheet, gill-side up.
  2. Step 2: In a small bowl, mix 2 tbsp olive oil, 3 minced garlic cloves, 1 tbsp fresh basil, 1/2 tsp salt, and 1/4 tsp black pepper.
  3. Step 3: Brush the mixture evenly over the top and inside the mushrooms.
  4. Step 4: Bake for 20 minutes until mushrooms are tender and slightly shriveled.
  5. Step 5: Sprinkle 1/4 cup grated parmesan cheese over mushrooms and bake for 2 more minutes until cheese is melted and golden.

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Frequently asked questions

How long does Baked Portobello Caps with Basil and Garlic take to make?

Total time is about 32 minutes (10 min prep + 22 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 Baked Portobello Caps with Basil 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 Baked Portobello Caps with Basil 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 Baked Portobello Caps with Basil and Garlic for a different number of people?

The recipe is written for 2 servings. Multiply each ingredient by (your serving target / 2). 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 Baked Portobello Caps with Basil and Garlic low carb?

Yes — this recipe is tagged low carb, keto, 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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