50/50 Mushroom Beef Burger

Get ready for a 50/50 Mushroom Beef Burger with Fajita Veg and Guacamole!

50/50 Mushroom Beef Burger from www.whatsgabycooking.com (@whatsgabycookin)


Does anyone remember when I was obsessed with the 50/50 bacon and beef burger 10 years ago? There was a small butcher shop here in LA that did a 50/50 bacon and burger grind and it made the most insane burgers. My grill would light on fire half the time from the excess fat from the bacon, but man was it good! These days we're keeping things a litttttttle bit healthier with a 50/50 burger and mushroom blend. These are EXTRAORDINARY! The mushrooms give the burgers even more flavor and keep things extra juicy... and dare I say it.... moist. Considering mushrooms are usually used as meat replacements in so many veg recipes... it makes total sense! Take them for a whirl this weekend over Memorial Day and then get ready for a slightly healthier spin on burgers for the rest of grilling season!

And word to the wise: if you prefer a slightly less mushroom mixture, you can do 75% beef and 25% mushroom and they will still be delish!

And while the below recipe calls for Crimini Mushrooms, really any mushroom will work. Just be sure to trim the stalk, wipe off any dirt, remove the gills if using Portobellos and then have at it! I tested it with shiitakes recently and it was incredible.

50/50 Mushroom Beef Burger from www.whatsgabycooking.com (@whatsgabycookin)

50/50 Mushroom Beef Burger

Author: Gaby Dalkin
5 from 6 votes
Get ready for a healthy spin on a burger!! It's made with 50% ground beef and 50% finely chopped mushrooms and it's truly the juiciest perfect burger of all times.
Prep Time 10 minutes
Cook Time 10 minutes
Total Time 20 minutes
Course Main Course
Cuisine American
Servings 4 people


  • 1 pound ground beef
  • 1 pound crimini mushrooms, pulsed until finely chopped in a food processor
  • 1 tablespoon of your favorite taco seasoning
  • 2 teaspoons dried parsley
  • 2 teaspoons kosher salt
  • ½ teaspoon freshly cracked black pepper

For the Toppings

  • 1 red bell pepper, sliced
  • 1 yellow bell pepper, sliced
  • 1 yellow onion, sliced
  • 1-2 avocados, smashed and seasoned with salt and pepper
  • 4 slices pepperjack cheese
  • 4 buns, toasted


  • Transfer the ground beef and chopped mushroom to a large bowl. Add in the taco seasonings, parsley, salt and pepper. Using your hands, incorporate everything together. Form the mixture into two ½"-thick patties
  • Grill mushroom beef burgers over medium heat until medium, roughly 4-6 minutes per side. Add the cheese for the last minute to melt
  • In a skillet, cook the peppers and onions fajita style until soft.
  • Serve each patty in a burger bun topped with sauteed fajita veggies and equal amounts of smashed avocado.


I shared this as a fajita burger but you can use whatever toppings your heart desires!

Nutrition Information

Calories: 620kcal | Carbohydrates: 38g | Protein: 34g | Fat: 38g | Saturated Fat: 14g | Polyunsaturated Fat: 3g | Monounsaturated Fat: 17g | Trans Fat: 1g | Cholesterol: 99mg | Sodium: 1641mg | Potassium: 1298mg | Fiber: 6g | Sugar: 8g | Vitamin A: 1288IU | Vitamin C: 101mg | Calcium: 280mg | Iron: 5mg
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  1. 5 stars
    Tried this tonight, it was great! I had some other small odds and ends in the fridge that I needed to use up, so I also tossed in some finely diced red onion, minced
    garlic, and a bit of crumbled feta in place of the melted cheese on top. Absolutely delicious, and I was surprised at how well they kept their shape! Thanks for the recipe/inspiration.

  2. I have been making these for a couple of years and they are delicious. I had bought a lot of mushrooms and some ground beef. At first I was going to put them on top of the burger, but I love mushrooms so I decided to cut them into tiny pieces and incorporate with the ground beef. Delicious and amazing. I never make a burger without adding mushrooms now.

  3. Hi Gaby! Have you ever tried sautéing the mushrooms before cooling and grinding for extra 'shroomy flavor? Or will the loss of moisture make the burgers dry?

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