Go Back
+ servings

Subscribe via email

and get a free e-cookbook:

Portobello Mushroom Bun Burgers with Guacamole

Yield: 4 people
Prep Time:
15 mins
Cook Time:
10 mins
Total Time:
25 mins
Portobello Mushroom Bun Burgers with Guacamole makes a delicious and healthy bunless burger recipe and tops it off with a perfect homemade guacamole. 
Print Recipe
4.34 from 3 votes


For the Guacamole

  • 1 avocado
  • 1/3 cup red bell pepper — finely chopped
  • 2 tablespoons diced tomatoes
  • ½ red onions — chopped
  • 1 garlic clove — minced
  • 1 tablespoon lime juice
  • Salt and black pepper
  • 1 tablespoon fresh cilantro — chopped (you can skip this ingredient if you don’t like cilantro)

For the Burger

For the Portobello Mushroom Buns

  • 2 tablespoons olive oil
  • Salt and black pepper
  • 1 garlic clove — minced
  • 8-12 Portobello Mushroom — stems and gills removed

For Serving

  • Slices of red onions — tomatoes, cooked bacon and microgreen leaves or any other green leaves you prefer to serve.


  1. Make the spinach sauce: Add avocado in a bowl and mash it with a fork. Add all the ingredients and stir well. Set aside.

  2. Place all the ingredients for the mushroom buns in a bowl, except for the mushrooms. Mix well. Add the mushroom into the olive oil mixture bowl and coat them well. Set aside for about 1 hour. Place “buns” on grill and let them cook for 4-5 minutes.
  3. To make the burger, combine all ingredients, except the olive oil, in a large bowl. Mix everything well to combine and using your hands divide the mixture into 4-6 burgers.

  4. Heat the olive oil in a non-stick grill pan (or simply cook your burger in a BBQ) over a medium-high heat. Cook the burger for 3-5 minutes on each side, or until reach 145°F for medium-rare or 160°F for well-done. Set them aside.
  5. To build each burger, top one Portobello mushroom guacamole, patty burger, more guacamole, two slices of red onions, 2 slices of bacon, 2 slices of tomatoes and some microgreen or leaves. Top with second Portobello mushroom ban.
Course: Main Course
Cuisine: American
Keyword: gluten-free, low-carb, lunch, paleo

Nutrition Information

Amount per serving (1/6) — Calories: 317, Fat: 18g, Saturated Fat: 5g, Cholesterol: 73mg, Sodium: 470mg, Carbohydrates: 14g, Fiber: 5g, Sugar: 8g, Protein: 22g

If you make this recipe, follow @primaverakitchen on Instagram, snap a photo and hashtag it #primaverakitchen. I'd love to see what you're making!

This post contains affiliate links. For more information, please visit my disclosure page here.