Earthy BBQ Portobello Caps

With Sweet Potatoes & Greens

BBQ Portobello Caps are the steaks of the mushroom family. Here is its version as marinated and grilled, yummy!

One of the things I love most about portobello mushrooms is their “meaty” factor. I realize that probably sounds a bit odd because HELLO we are talking about a vegetable, but in kingdom veg, portobello mushrooms are especially satisfying, especially when grilled.

This recipe has a mega advantage over baked portobellos mushroom recipes: NO clean up at the end!

BBQ Portobello Caps

Nicole Kearsley
How to make the best BBQ Portobello Caps? A simple recipe that’s perfect for a portobello steak, grilled portobello mushroom burger, or easy side.
5 from 1 vote
Prep Time 15 mins
Cook Time 35 mins
Total Time 50 mins
Course Main Course
Cuisine American, Vegan
Servings 2


  • 4 caps  Portabello Mushroom 
  • 1 tablespoon Brown Sugar
  • 1/2 cup Barbeque Sauce
  • 2 pounds Sweet Potatoes peeled and cubed
  • 1 bunch Collard Greens
  • 1/4 cup Apple Cider Vinegar
  • 1/2 teaspoon Red Peper Flakes
  • 2 cloves Garlic sliced
  • 1/2 teaspoon Vanilla Extract


  • Place sweet potatoes into a medium pot and cover with water. Bring to a boil, and cook for 20 minutes or until fork-tender.
  • Using a measuring cup, reserve 1 cup of the cooking liquid from the pot and set aside. Drain once cooked. (Instantpot 4 minutes, natural release).
  • Cut the thick stem ends off the bunch of collard greens. Stack the greens about 5 leaves high, roll together, and cut into 1 inch thick pieces. Continue for the entire bunch.
  • Score the mushrooms in a crisscross pattern with a knife, about 1/4 inch deep. Rub the mushrooms with 1 tablespoon of olive oil, and season with salt and pepper to taste.
  • Over a preheated medium-high heat grill, place mushrooms top side down. Allow cooking for about 4 to 5 minutes, turning when brown and crisp on top.
  • Coat the top with barbeque sauce. Cook for another 4 to 5 minutes on the bottom side. (Alternately saute in a skillet over medium-high heat)
  • Once mushrooms are cooked, remove from heat and set aside. In a skillet over medium-high with 1 Tbsp olive oil add garlic. Cook for 1 minute then add collard greens and red pepper flakes.
  • Sauté collard greens for 3 minutes, tossing to incorporate garlic. Add apple cider vinegar and cook for another 5 minutes, season with salt and pepper to taste. They will be soft and dark green when finished.
  • To finish sweet potatoes, add them to a food processor, along with brown sugar and vanilla. Pulse until a smooth mixture forms, adding reserved cooking liquid if necessary(alternately
    mash manually).
  • Serve sweet potatoes topped with greens and BBQ mushroom caps.


UMAMI FLAVOR: The key to mega mushroom success is to enhance their flavor with a basic marinated portobello mushroom.
*STORAGE: BBQ Portobello Caps are best enjoyed the day they are made but can last for a few days in the refrigerator.
**SERVING: This recipe yields 15 grams of protein for each serving.
***CREDIT: Recipe adapted from Purple Carrot.
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One Comment

  1. 5 stars
    Hi there! This blog post could not be written much better! Reading through this post reminds me of my previous roommate! He continually kept talking about this. I will forward this post to him. Fairly certain he’s going to have a great read. I appreciate you for sharing!

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