Mushroom and Halloumi Burger Recipe

MASH burger

  • serves 4
  • Easy

Check out our recipe for the ultimate veggie burger packed with mushroom, avocado, spinach and halloumi - ready in just 30 minutes


Make this MASH burger for a next level vegetarian BBQ option, or try more veggie burger recipes, such as our easy homemade veggie burgers, falafel burger and vegan black bean burger.



  • large flat mushrooms 4, stalks removed
  • olive oil
  • garlic 1 clove, crushed
  • halloumi 1 block, cut into 8 slices
  • mayonnaise 4 tbsp
  • harissa 1 tbsp
  • avocado 1, sliced
  • burger buns 4, toasted
  • spinach a good handful
  • red onion ½, finely sliced


  • Step 1

    Heat the oven to 200C/fan 180C/gas 6. Put the mushrooms onto a baking tray. Mix 1 tbsp olive oil with the garlic and brush all over the mushrooms. Bake, turning now and again, for 20-25 minutes or until cooked and juicy.

  • Step 2

    Meanwhile, fry the halloumi in a dry pan until golden. Mix the mayo with the harissa.

  • Step 3

    To assemble the buns, spread both sides with harissa mayo then layer up with avocado, mushrooms, halloumi, onions and spinach. Finish with a bun top.

Check out more of our best veggie burger recipes...

Spiced Falafel Burgers Recipe

Nutritional Information

  • Kcals 766
  • Fat 52.6g
  • Saturates 14.1g
  • Carbs 45.6g
  • Sugars 6.9g
  • Fibre 5.1g
  • Protein 25g
  • Salt 3g