Vegan Spinach, Mushroom & Caramelized Onion Quesadillas


Boy that title’s a mouthful, isn’t it?  Just wait … it gets longer because I ADDED something after I made this and took pictures!

I was searching for a vegan type taco or quesadilla recipe the other day and kept finding ones with vegetables, like butternut squash and black beans.  And while that sounds good too I was really looking for something more maybe fajita like with onions.

Deep caramelized onions.

I don’t know … but whatever it was I was looking for, constantly had cheese and sour cream and I didn’t want that since I’m trying to eat more plant based.  I couldn’t find what I was looking for and ended down the rabbit hole for 2 hours… so I came up with my own.

I started by sautéing about 3 large yellow onions in a little olive oil.   In order for the onions to caramelize they need to be cooked over a very low flame for approximately 30-40 minutes.  So this takes a little time.


About 30 minutes in, I added some white button mushrooms and baby bellas.  I let this cook down a little further until the mushrooms released all their liquid and were soft, another 10 minutes.caramlized-onions1

Then I took a large burrito (this was all I had) and put some spinach, mushrooms and onions only on one side and then I folded it over.


I cooked it for a minute or two to crisp up the tortilla and then flipped it.


Here’s the problem:

  1. The burrito (besides being white) was too big.
  2. The end pieces with the fold worked well, but each time I took a bite from the middle one everything fell out.
  3. The cheese traditionally used in quesadillas keeps it together, so I needed to come up with something to bind it.

So, I decided to use some refried beans I had in the freezer and use that as my binder, then I used a SMALLER, whole wheat tortilla and it worked amazing!


This time I didn’t use spinach though, but you can see how everything stayed inside and stuck to the refried beans.


This spinach, mushroom and onion quesadilla really filled my craving for meat.  The deep caramelization of the onions along with the mushrooms always reminds me of steak and the beans filled that meat type craving.

There are enough onions and mushrooms here for several quesadillas.  Put the rest in a container and then it will take literally under 5 minutes to throw one of these together !!

So, NOW I’m calling them ~ Spinach, Mushroom and Caramelized Onion with refried beans Quesadillas!  😉


Vegan Spinach, Mushroom & Caramelized Onion Quesadillas



  • 2 Tablespoons olive oil
  • 3 large yellow onions, peeled and sliced
  • 2 (8 oz) packages mushrooms (I used button and baby bella)
  • fresh spinach leaves
  • refried beans


  1. Start by sautéing the onions in the olive oil over low heat. This will take between 30-40 minutes until they are a deep caramel color. Stir often checking if they need more oil to keep from burning. Season with salt and pepper and a teaspoon of sugar will also help them deepen in color.
  2. Add the mushrooms about 30 minutes in and let them release their liquid and soften, another 10 minutes.
  3. Wipe out the skillet and keep over low heat.
  4. Spread a small amount of refried beans on a small whole wheat tortilla, spread some of the onion/mushrooms on ONE SIDE only and top with some baby spinach leaves.
  5. Place in the skillet and let it crisp up (1 min or 2) then fold the tortilla in half.
  6. Cut in 2 and serve.

Recipe Source:
I used all organic ingredients when making this recipe, and hope you do too!  🙂


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  1. I’m gonna surprise my girlfriend with this tonight! Thank you for the recipe.

  2. I’m so happy to have found your recipes for cooking with mushrooms!!

  3. Thanks for the recipe!! I’m vegan now and miss quesadillas so much. I mashed some white beans for the refried and used spinach with the mushrooms, these were so delicious and stayed together very nicely.

    • Thanks for the comment. I am always on the hunt for vegetarian/vegan types of recipes too. I’m glad you liked them.

  4. Thank you very much. I really love this recipe. I tried it today for my dinner, but I replaced refried beans with basil pesto, so it might be not good as your original recipe. Anyways, I still love it. Thanks.

  5. This was SO good! I used white corn tortillas and left the spinach in. Brilliant idea to use refried beans instead of cheese. We will definitely be having theses again!

  6. This looks delicious! I love mushrooms so I’m definitely going to give this a go. Thank you!!

  7. this looks delish, I am vegetarian but also trying to reduce my dairy and this is exactly what I’ve been looking for. I like the idea if the refried beans to bind it. Going to try them this week 🙂

    • Thanks Rebecca. It sounds like you and I are on the same boat. I’m also eliminating my dairy also. Good luck! Deb


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