Looking for a satisfying vegetarian burger that doesn’t compromise on flavour? These portobello mushroom burgers are a simple yet delicious alternative to a traditional beef burger – perfect for a weekend lunch, summer barbecue or easy midweek dinner.
Portobello mushrooms are ideal for burger recipes thanks to their naturally meaty texture and rich, savoury flavour. When grilled, they become tender and juicy, making them a popular choice for plant-based meals – whether you’re vegetarian or simply looking to cut back on meat.
This recipe pairs chargrilled mushrooms with creamy avocado, tangy goat’s cheese and earthy beetroot for a balanced combination of flavours and textures. Served in a soft brioche bun and topped with a herby red onion mix, it’s a fresh, vibrant take on the classic burger.
As well as being full of flavour, this vegetarian burger recipe also delivers on nutrition. Mushrooms are a source of fibre and B vitamins, while avocado provides healthy fats. Beetroot adds natural sweetness along with antioxidants, making this a well-rounded option for a lighter, feel-good meal.
INGREDIENTS
For the burgers (serves 4)
- 4 portobello mushrooms
- 4 brioche buns
- 2 avocados, peeled, sliced and drizzled with lemon juice and a pinch of salt and pepper
- 2 beetroots, sliced
- Goat’s cheese, sliced into 4 discs
For the herby red onion
- 1 red onion, sliced
- 2 tbsp parsley, finely chopped
- 1 tbsp dried oregano
METHOD
- Preheat the grill to high.
- Heat a griddle pan and char the brioche buns.
- Drizzle the mushrooms with olive oil and season well. Chargrill them until soft and cooked. Set aside.
- In the same pan, add the red onion and a little dash of olive oil. Season well and cook until the onion is starting to caramelise. Remove to a bowl and stir in the herbs.
- Top each bun base with a slice of beetroot, avocado, a mushroom and the herby red onion mixture.
- Place a disc of goat’s cheese on the top, place under the grill until the cheese starts to melt and top with the other half of the bun. Serve immediately – and enjoy!
These portobello mushroom burgers are all about balance – combining creamy, tangy and earthy flavours in every bite. They’re quick to prepare, easy to customise and ideal if you’re looking for a vegetarian burger that feels just as satisfying as a classic.
