Low Carb Vegan Mushroom Burgers (gluten-free, soy-free, high-protein)

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Low carb vegan mushroom burgers are something that’s been on my “to do” list for a long while. I really like the flavor and texture of a nice, grain-based mushroom burger, but not so much the carbs and their effects. So, I figured it was time to add a vegan keto mushroom burger to my recipe catalog. If you follow me on instagram, you know that this went through many, many iterations over the past few weeks, but I’m so excited to finally found the right ratio to make a delicious and keto-friendly burger.

You guys make a lot of requests for the ingredient content of these recipes, and I try to listen and make everything as accessible as possible to those with dietary needs. So, with that in mind, this high-protein, low carb, vegan mushroom burger contains:

  • no soy
  • no flax
  • no coconut
  • no nuts
  • no oils
  • no psyllium
  • no gluten (none of my recipes have gluten!)

Whew, that’s quite a list. Instead of any of those ingredients, this burger is simple and includes relies on just seven things, including seasoning:

  • mushrooms
  • chia seeds
  • tahini
  • pea protein powder
  • smoked salt
  • pepper
  • rosemary

You may notice that there’s no oil listed above and that the directions call for the mushrooms to be cooked in a pan, without oil. If you have a nonstick skillet, you may not need to add anything, but I like to add a splash of water in place of where oil would be. When I was a Healthy Eating Specialist at a pretty-well-known natural grocery store, we used to do this for any veggies that needed cooking and called it “water sauteing.” You basically cook whatever food you would normally cook in oil, in just a little bit of water.

a vegan keto mushroom burger with beet hummus, broccoli sprouts, pickles and arugula salad
Guys, I grew that lettuce in my container garden! I’m so proud because it’s my first time growing lettuce and I typically am not good at gardening.

What to Expect From Low Carb Vegan Mushroom Burgers

Do they taste like a Beyond Burger or an Impossible Burger? Nope! That’s a project for a different day. These burgers are more along the lines of a standard grain-based veggie burger you might find in the freezer section of your grocery store, but without the carbs or grains.

Notes on Making Low Carb Vegan Mushroom Burgers

  • This recipe doubles really nicely.
  • The pink stuff on the burger in these pictures is vegan keto beet hummus. I also added sauerkraut, broccoli sprouts and made the wrap from lettuce from my garden!
  • If you don’t like pea protein powder, or don’t have any on hand, you could use whichever plain, plant-based protein powder you like best.
  • Soy/chickpea/lupin flour can also be subbed in for the protein powder in a 1:1 ratio.
  • If you want  a slightly less firm burger, 1-2 tbsp of pea protein powder should do the trick. For a firmer burger, 3-4 tbsp will work. I found 4 tbsp to be a bit too firm, and 1 tbsp to be a little soft, so the 2-3 range is the “Goldilocks zone” for me, but to each their own.
  • While I used smoked sea salt and dried rosemary here, you could use whatever salt/seasoning blend you prefer. Truffle salt and rosemary or parsley is also really nice here.
  • While I strive to provide accurate nutritional information, please keep in mind that different brands and variety of ingredients have differing nutritional values, so your calculations may vary.

vegan keto mushroom burger pinterest image

a vegan keto mushroom burger with beet hummus, broccoli sprouts, pickles and arugula salad

Low Carb Vegan Mushroom Burgers (gluten-free, soy-free, high-protein)

Print Recipe
These protein-rich mushroom burgers are delicious, savory and a perfect low-carb dinner!
Course entree
Cuisine vegan keto
Prep Time 20 minutes
Cook Time 20 minutes
Total Time 40 minutes
Servings 3 mushroom patties
Calories 171


  • 8 oz ~225g sliced mushrooms
  • 1/4 cup 60g tahini
  • 1 tbsp ground chia seeds
  • 1/4 - 1/2 tsp salt I used smoked sea salt
  • 1/8 - 1/4 tsp cracked black pepper
  • 1/4 tsp ground dried rosemary or your seasoning of choice - cumin and paprika is also lovely here
  • 2-3 tbsp unflavored pea protein or protein powder of choice


  • Preheat your oven to 350°F (177°C) and line a rimmed baking sheet with parchment paper or a silicone baking mat.
  • In a large skillet, cook mushrooms on medium-low heat until they are completely soft. Be sure to stir them frequently.
  • Let cool for a bit, drain off excess liquid and roughly chop up mushrooms either by hand or in a food processor or blender (see images below for what this should look like).
  • Stir the tahini, chia seeds, salt, pepper and rosemary in with the chopped mushrooms until everything is thoroughly combined.
  • Let this mixture stand for about five minutes, so the chia can absorb excess moisture and the mixture thickens.
  • Stir in the protein powder until it's completely absorbed, starting with just two tablespoons and adding the third a teaspoon at a time. You don't want the mixture to be dry, so stop adding the protein powder if it doesn't mix in thoroughly.
  • Form into three equal patties, about 4in (10cm) across and 1/2in (~1cm) thick. Place the patties on the baking sheet (no need to worry too much about spacing) and bake for 20-25 minutes, until firm. You can flip them after 15 minutes, but it's not totally necessary.
  • Remove the patties from the oven, let cool for a few minutes and enjoy!


Start off with just 2 tbsp of the protein powder. If the dough is still sticky, continue to add in 1 tsp at a time until the dough is relatively "dry" looking, but no crumbles of powder appear. In all the tests I did, this was usually about 2.5-3 tbsp, sometimes less, sometimes more. Nutrition info is for the 3 tbsp.


Serving: 1 | Calories: 171kcal | Carbohydrates: 3.5g | Protein: 12g | Fat: 12.2g | Fiber: 3.3g


a bowl of chopped mushrooms
This is what the chopped mushrooms should look like – slightly varying sizes are fine and the important thing is to not have extra liquid, or these can get gummy.
a bowl of "dough" for making vegan keto mushroom burgers
The “dough” for these mushrooms burgers shouldn’t be too wet or too dry. Basically, it shouldn’t be super sticky, but you also don’t want any dry bits of flour. This is why I like to add in the protein powder slowly.

Join the Conversation

  1. So stoked to try these! Curious though, would other nut or seed butters work here as well?

    1. Liz Author says:

      Hi Sarah! They should work, but you may need to thin them a bit or just use less protein powder to get the same texture. I’m also not sure how the taste would be!

  2. Will these keep in the fridge? Can I freeze them?

    1. Liz Author says:

      Hi, Beth! Great question! You can freeze them or store them in the fridge and then reheat in the oven or microwave. 🙂

  3. can you recommend the pea protein you used i normally use the VEGA Sport I am missing eating veggie burgers so I can’t wait to try this recipe.

    1. Liz Author says:

      Hi, Anne – good question! I just use an unflavored pea protein powder for this. The brand I use most often is called Anthony’s and is available on Amazon, but there are plenty of brands out there! The key is to make sure it’s unflavored and unsweetened 🙂

  4. Hi Liz, these look so good and it’s so great they are low carb. Thanks for the recipe. Would ground flax work instead of chia as I am trying to go lectin free? Have you any thoughts on the Plant Paradox system and switching the heavy lectin containing foods or using different methods to prep them?
    I have just got your Thanksgiving recipe e book as the Tofu Turkey, sprouts and mashed turnip looked so appetising and I am looking forward to making it, although for us in UK it would be lovely for Xmas dinner but it sounds so quick and easy that it will not wait till then though!
    Again, many thanks for all your wonderful low carb recipes, Sandy

    1. Hi Sandy! So sorry for the delayed response, this somehow got caught in my spam filter!

      Ground flax should definitely work here instead of chia! I usually use flax and chia interchangeably and switch around as while chia is higher in lectins, flax is really high in phytoestrogens. So, it’s really all about balance. 🙂

      I hope you enjoyed the recipes in the Thanksgiving ebook! I make them all the time outside of the holidays as well. They’re just lovely and filling fall/winter foods. 🙂

  5. Olivia Stanford says:

    Hey i was wondering what can i use instead of tahini to make it a bit lower in fat?

    1. Hi Olivia, you could try using a vegan cream cheese substitute. 🙂

      1. Olivia Stanford says:

        Would vegan mayo work?

        1. Liz Author says:

          Hi Olivia, I’m not sure – it would provide some moisture, but likely won’t bind as well.

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