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  • Prep-time: / Ready In:
  • Makes 4 sandwiches

Breaded, air-fried, and topped with a creamy vegan Thousand Island Aïoli, these aren’t your basic portobello burgers. Nutritional yeast adds a nice cheesy flavor to the breading batter. If you’ve got leftover aïoli, store it in an airtight container and refrigerate up to 3 days; use it as a salad dressing or in a sandwich or wrap.

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Two breaded air-fryer portobello burgers shown from above, drizzled with Thousand Island dressing, which is also in a ramekin between the burgers

Ingredients

  • ¼ cup soaked raw cashews
  • 1 tablespoon low-sugar ketchup
  • ⅔ cup unsweetened, unflavored plant milk, such as almond, soy, cashew, or rice
  • 1 tablespoon chopped onion
  • 2 teaspoons dill pickle relish
  • ⅓ cup whole wheat panko bread crumbs
  • 3 tablespoons nutritional yeast
  • 1 teaspoon garlic powder
  • ½ teaspoon onion powder
  • ¼ teaspoon smoked paprika
  • 4 portobello mushrooms, stems and gills removed
  • 4 whole wheat hamburger buns
  • Leaf lettuce
  • Tomato slices

Instructions

  1. Make Thousand Island Aïoli: In a small food processor place cashews, ketchup, and chopped onion. Cover and process, gradually adding 3 to 4 Tbsp. plant milk until aïoli is smooth and about the consistency of mayonnaise. Stir in relish. Set aside.
  2. Preheat air fryer to 390°F. In a shallow bowl stir together panko, nutritional yeast, garlic powder, onion powder, and paprika. Place ⅓ cup plant milk in a second shallow bowl.
  3. Dip portobello mushrooms in plant milk and then panko mixture, lightly coating all sides. Place mushrooms gill-side down in a single layer in air fryer. Air-fry 7 to 9 minutes or until mushrooms are tender and breading is crisp. Transfer mushrooms to a platter.
  4. Add separated hamburger buns to air fryer, in batches if necessary. Air-fry 1 to 2 minutes or until lightly toasted. Repeat until all buns are toasted. Fill buns with lettuce, burgers, tomato slices, and Thousand Island Aïoli.

Comments (13)

(5 from 5 votes)
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Noelle6 days ago
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I have to say I was a little skeptical about these, but they were absolutely delicious. Even my husband who doesn’t like vegetables really enjoyed it and said he would eat them again.

Loretta3 months ago
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Is there a oven version of this recipe?

Sashi3 months ago
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I usually add ~50 degrees to the temp and increase the time by 25% to convert to oven baking. For this, I would 450 for 9-12 minutes.

debbie bader8 months ago
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i want to make this

Rochelle (Shelley) BERMAN8 months ago
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This looks great. Can’t wait to try.

CindyLu9 months ago
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Delicious! And pretty easy, too. Yum! Yum!

Yoagee9 months ago
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I am totally allergic to tomatoes, but red peppers do not make me break out.
I used roasted red/orange peppers and follow an Italian sauce recipe to make pepper sauce. I also add carrots and dates to sweeten the sauce. It’s pretty awesome.
I’m going to add that instead of ketchup.

michell6 months ago
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THANK YOU for this – my husband runs if I mention dill pickle relish – relish – pickle – he will run to the next towns bar and won’t return home! I will absolutely try your carrots, dates mix to the sauce – thank you for sharing that!

Joann m lakes1 year ago
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I found the recipe a bit bland so I added 1/2 tsp chili powder to the panko mix to perk it up.
Also, the recipe doesn’t tell you to add the relish to the aioli sauce.

Sheral1 month ago
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Recipe says to stir in the relish after processing the rest of the ingredients.
So sorry you didn’t like this! I’ll try the double air fry on the portobellos.

Connie Merrill1 year ago
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I absolutely loved this, made it for non vegan friends they are still raving about this recipe. I had no problem with air frying. Just kept an eye and made sure the mushrooms were cooked. Love the thousand island aioli.

Sandra Aylward1 year ago
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We were disappointed in these. The portobellos had to go back into the air fryer for a second round – not cooked at all after the first try. Overall, the flavours were unimpressive. Would not make these again.

paul schneider1 year ago
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delectable and we use the aioli for other stuff too (good to have on hand) 😉 🙂 😉

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about the author

Nancy Macklin, RDN

Nancy Macklin has a bachelor of science in dietetics from Iowa State University and a Master of Science in health services administration from the University of Saint Francis. Macklin worked as a hospital-based clinical dietitian, providing counseling for diabetes, heart disease, and weight loss and as a food service director in health care dining sites. She now serves as a test kitchen dietitian, developing 500+ recipes per year. She is a member of the Academy for Nutrition and Dietetics and International Association of Culinary Professionals. Find her on LinkedIn.

Two breaded air-fryer portobello burgers shown from above, drizzled with Thousand Island dressing, which is also in a ramekin between the burgers see more from this author
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