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Grilled Portobello Burgers with Avocado – A Delicious Low-Carb Alternative

When you’re craving a juicy, satisfying burger but want to skip the heavy carbs and greasy fast food, it’s time to try a Grilled Portobello Burger with Avocado. This veggie-packed, low-carb option is not only incredibly delicious—it’s also full of nutrients and easy to prepare.

Whether you’re vegetarian, gluten-free, or just trying to eat more whole foods, this burger is a win. It swaps the traditional bun for hearty grilled Portobello mushroom caps and adds creamy avocado, crisp lettuce, tomato, and onion for a balanced, mouthwatering bite. And the best part? It’s ready in just 20 minutes.

Why Choose Portobello Mushrooms?

Portobello mushrooms are the unsung heroes of the plant-based world. They’re rich in umami flavor, have a meaty texture, and are surprisingly satisfying. When grilled, they develop a smoky depth that mimics the taste of a grilled burger patty—without the saturated fat or calories.

Plus, Portobellos are low in carbs and calories, making them ideal for anyone following a low-carb or keto lifestyle. They’re also a good source of antioxidants, B vitamins, and minerals like selenium and copper.

Grilled-Portobello- Burgers-with-Avocado

Grilled Portobello Burgers with Avocado

Print Recipe Pin Recipe
Prep Time 10 minutes
Cook Time 10 minutes
Total Time 20 minutes
Course Dinner, Lunch
Servings 1 serving
Calories 380 kcal

Equipment

  • 1 Cutting Board
  • 1 Grilled Pan

Ingredients
  

  • 2 large Portobello mushroom caps
  • 1 tbsp olive oil
  • 1/2 Avocado
  • 1 leaf Romaine Lettuce
  • 1 slice Tomatoe
  • 1 slice Red Onion
  • Salt and Pepper

Instructions
 

  • Peheat the grill or grill pan over medium heat.
    Brush mushroom caps with olive oil and sprinkle with salt and pepper.
    Grill mushrooms for 4–5 minutes on each side until tender and grill marks appear.
    Assemble the burger:
    place lettuce, tomato, onion, and avocado between the grilled mushrooms or use one mushroom as a "bun" and serve open-faced.
    Serve immediately with your favorite low-carb side.

Notes

Nutrition (Per Serving)

  • Calories: 380
  • Protein: ~5g
  • Carbohydrates: ~9g
  • Fat: ~35g
  • Fiber: ~4g
  • Net Carbs: ~5g

Notes

  • For extra flavor, marinate mushrooms in balsamic vinegar for 10 minutes before grilling.
  • Add a slice of cheese or grilled halloumi if desired.
  • Great served with a side of zucchini fries or a cucumber salad.
Keyword Low-Carb, Vegetarian, Gluten-Free, Summer, Grilled

A Perfect for Any Occasion

This burger is a fantastic option for:

  • Summer grilling nights

  • Meatless Mondays

  • Quick weekday lunches

  • Meal prep for low-carb eating

Pair it with zucchini fries, a side salad, or cauliflower mash for a complete, clean meal.

Final Thoughts

Eating healthy doesn’t mean giving up the foods you love. The Grilled Portobello Burger with Avocado is proof that you can enjoy bold, comforting flavors while sticking to your wellness goals.

It’s simple, flavorful, and a creative twist on a classic favorite that everyone can enjoy—even the meat lovers in your life!

So the next time you’re planning your weekly meals, don’t forget to add this low-carb, plant-based burger to the list. Your taste buds—and your body—will thank you.

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