Taco-Stuffed Portobello Mushrooms with Avocado Crema

By · Reviewed by AislePrompt Editorial · ·

Large Portobello mushrooms filled with seasoned beef taco meat, topped with melted cheese and served with a smooth avocado crema for a low-carb twist on classic tacos. This mexican-inspired beef (low carb) ready in about 35 minutes pairs (85% lean) ground beef, olive oil, small, finely diced onion for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 420 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: 20 min Serves 4 Mexican cuisine 420 cal/serving
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Ingredients

Instructions

  1. Step 1: Preheat the oven to 400°F. Brush 4 large Portobello mushroom caps with 1 tbsp olive oil and place gill side up on a baking sheet.
  2. Step 2: In a skillet over medium heat, sauté 1 small finely diced onion in 1 tbsp olive oil for 3 minutes until soft. Add 1 lb ground beef, 2 tbsp taco seasoning, 1/2 tsp garlic powder, 1 tsp chili powder, 1/2 tsp salt, and 1/4 tsp black pepper. Cook, breaking up the meat, for 7-8 minutes until browned and cooked through.
  3. Step 3: Divide the seasoned beef mixture evenly among the mushroom caps. Sprinkle 1 cup shredded cheddar cheese over the top of each.
  4. Step 4: Bake in the preheated oven for 15 minutes until mushrooms are tender and cheese is melted and bubbly.
  5. Step 5: Meanwhile, prepare the avocado crema by blending 1 ripe avocado, 1/4 cup sour cream, 1 tbsp lime juice, 2 tbsp water, and the remaining 1/2 tsp salt and 1/4 tsp black pepper until smooth.
  6. Step 6: Remove mushrooms from the oven, drizzle with avocado crema, and garnish with 2 tbsp chopped fresh cilantro. Serve warm as a satisfying low-carb taco alternative.

Equipment for this recipe

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Frequently asked questions

How long does Taco-Stuffed Portobello Mushrooms with Avocado Crema take to make?

Total time is about 35 minutes (15 min prep + 20 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 Taco-Stuffed Portobello Mushrooms with Avocado Crema?

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 (85% lean) ground beef from drying out.

Can I substitute ingredients in Taco-Stuffed Portobello Mushrooms with Avocado Crema?

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 Taco-Stuffed Portobello Mushrooms with Avocado Crema 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 Taco-Stuffed Portobello Mushrooms with Avocado Crema low carb?

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

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