Vegetarian Mushroom Burgers

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Where’s the beef? You don’t need it when you make these amazing vegetarian mushroom burgers! The patty is made of mushrooms, and when topped with caramelized onions and a garlic aioli, it’s burger heaven!!!

Vegetarian Mushroom Burgers with a garlic aioli - the most incredible mushroom Swiss burgers, and they're VEGETARIAN! Recipe on GoodieGodmother.com

If you want to encourage someone to eat vegetables, start with mushrooms. At least, this was the case with the Godfather. He wasn’t a big vegetable eater when we started dating, so as we got serious, I needed to expand his palate a bit in that department. One of the easiest ways to do that was to start cooking with mushrooms. He already enjoyed mushroom Swiss burgers, so I knew mushrooms were a good place to start. I started putting them into stir fry and pasta dishes, and they’re a regular item in our crisper. Nevertheless, you can imagine my surprise when my husband, who makes an ah-mazing beef burger (recipe posting in the next few weeks), came to me one day and said, “I’d like to make a burger with a mushroom patty. Not just a portobello mushroom cap with burger toppings, but an actual patty made out of mushrooms.” I was of course, curious, and totally excited, and that’s how these vegetarian mushroom burgers came to be. It took exactly 1 bite for them to earn a place on our “favorite burger list.” 

Vegetarian Mushroom Burgers with a garlic aioli - the most incredible mushroom Swiss burgers, and they're VEGETARIAN! Recipe on GoodieGodmother.com

I wish I could better describe how amazing these burgers are. Actually, I really wish I could just reach through the screen and hand you a burger to try, because that would mean I’d have one to eat too. I can’t even look at these pictures without smelling the patties and tasting the best vegetarian burger I have *ever* eaten.

The Godfather was able to make these up rather quickly using our big food processor so he didn’t have to dice the mushrooms by hand (what a chore!), and then he cooked them down in a large skillet to reduce the liquid. This is an important step, because mushrooms retain a lot of liquid and if you don’t cook them down before shaping the patties, your patties won’t hold together and you won’t get the right “burger” texture.

Vegetarian Mushroom Burgers with a garlic aioli - the most incredible mushroom Swiss burgers, and they're VEGETARIAN! Recipe on GoodieGodmother.com

After cooking down the mushrooms he mixed up the patties, and cooked them right on our grill pan. He only cooked half because the smell made our mouths water and we felt ravenous, but they grilled up so well on the grill pan. We enjoyed the rest the next day, and they grilled up even better than the first day! So if you’re going to make these vegetarian mushroom burgers for a summer barbecue if you have vegetarian guests (even if you don’t, seriously, make them), you can make the patties the day before and refrigerate. We haven’t tested on the grill yet, but the Godfather is confident that the patties would hold up on the grill. We fully intend to outdoor grill some mushroom patties this summer.

Vegetarian Mushroom Burgers with a garlic aioli - the most incredible mushroom Swiss burgers, and they're VEGETARIAN! Recipe on GoodieGodmother.com

Summer is just around the corner, as is grilling season for everyone that isn’t crazy enough to be grilling/barbecuing in the snow (*cough* the Godfather), so my advice to you is to get to the store to buy some mushrooms and start “practicing” now. You’ll be amazed at the incredible texture and flavor you get from these mushroom burgers, and it will never once cross your mind to ask, “Where’s the beef?”

Vegetarian Mushroom Burgers with a garlic aioli - the most incredible mushroom Swiss burgers, and they're VEGETARIAN! Recipe on GoodieGodmother.com

Vegetarian Mushroom Burgers
 
Prep time
Cook time
Total time
 
Vegetarian Mushroom Burgers with a garlic aioli - the most incredible mushroom Swiss burgers, are vegetarian. 😉
Author:
Recipe type: Sandwich
Cuisine: American
Serves: 6 servings
Ingredients
Mushroom Burger Patties:
  • 24 oz fresh mushrooms
  • 1 tbsp oil
  • 7 cloves garlic, minced
  • ½ medium onion, finely diced (about 1 cup)
  • 1 tsp salt
  • ½ tsp black pepper
  • ½ tsp dried oregano
  • ⅔ cup rolled oats
  • ¾ cup panko bread crumbs
  • ½ cup Parmesan cheese, grated
  • 2 eggs, lightly beaten

Garlic Aioli
  • 6 cloves roasted garlic, diced fine (or 4 cloves finely minced fresh)
  • ¼ tsp salt
  • ½ cup mayonnaise
  • juice from half a lemon (about 1 tbsp)

To assemble the burgers
Instructions
  1. Wash mushrooms and pat dry
  2. Run mushrooms through food processor, chop 5-10 seconds or until cut into small chunks
  3. Cook chopped mushrooms in large skillet with oil until juice is released and mostly evaporated
  4. In large mixing bowl, place cooked mushrooms and mix in minced garlic, chopped onion, salt, black pepper, oregano, rolled oats, panko, and parmesan cheese
  5. Add beaten eggs to the bowl, stir and mix until consistent
  6. Let mixture stand for up to 10 minutes
  7. Form into ¼ to ⅓-pound patties (no larger than the size of the palm of your hand)
  8. Cook patties on grill pan or conventional grill; do not flip until patty can be easily moved with spatula

Making the easy garlic aioli:
  1. Combine all ingredients in a small bowl, cover, and place in the refrigerator until ready to use

When it's time to serve the burgers:
  1. Place one patty per bun and top with cheese, onions, and garlic aioli.
  2. Enjoy!

 

Vegetarian Mushroom Burgers with a garlic aioli - the most incredible mushroom Swiss burgers, and they're VEGETARIAN! Recipe on GoodieGodmother.com

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8 Comments on Vegetarian Mushroom Burgers

  1. Sarah
    May 19, 2016 at 9:12 pm (1 year ago)

    Just to clarify, you cook the mushrooms dry? No oil or anything added in the pan?

    Reply
    • The Godfather
      May 19, 2016 at 9:24 pm (1 year ago)

      I used about one tablespoon of oil to cook the mushrooms. I realized I omitted the ingredient in the ingredient list, but I do call for it in the recipe procedure.

      Reply
  2. Paige @ Where Latin Meets Lagniappe
    April 20, 2016 at 6:14 am (1 year ago)

    MARY!!! These look totally amazing — I love mushrooms, onions, and Swiss, and I’m not much of a burger fan … I like them, but only on occasion. I could DEFINITELY see myself eating these often!

    Reply
    • Mary (The Goodie Godmother)
      April 22, 2016 at 7:43 am (1 year ago)

      These aren’t as heavy as a beef burger, so definitely easier to enjoy! Who doesn’t love a sandwich made practically of toppings?

      Reply
  3. Whitney
    April 17, 2016 at 8:27 pm (1 year ago)

    I looooove veggie burgers, but I have never used mushrooms as a base unless it’s with a portobello. Never thought to chop them up and use other ingredients to make a patty. These look amazing! Wish I had seen this recipe a few years ago when I was on a vegetarian diet.

    Reply
  4. Byron Thomas
    April 17, 2016 at 7:46 am (1 year ago)

    Mary, these look adorbs! They are perfect for me, because I’m always looking for a veggie burger option. Finding a veggie burger that holds up well on an outdoor grill is damn near impossible. I’m really looking forward to the godfather’s feedback when he gets around to doing just that. Bravo!

    Reply

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