Portobello burger with mature cheddar

Sometimes I miss eating a burger. Not the (meat) flavour, but the possibility of just going out and grabbing a burger. It’s hard to find a good vegetarian burger! So what’s one to do? Make your own (deluxe, according to Jan) burger at home.

Portobello burger deluxe

Portobello burger deluxe


  • 2 multi-grain poppy seed bread buns (baked or unbaked)
  • 2 big portobello mushrooms, stems removed, clean
  • 50 gr mature cheddar (use the good stuff here)
  • olive oil
  • salt & pepper
  • mayonnaise, ketchup, mustard (to taste)
  • lettuce mix, tomato, cucumber, carrot (or other salad fixings), for serving


Here I’m really only telling you how to make the portobello burgers. I like to eat a nice salad with my burgers. Today’s was young leaves, carrot, cherry tomatoes, cucumber,  and a olive oil, balsamic vinegar & salt dressing. Salad is pretty much a pick your own adventure sort of thing, so get creative with it!

  1. Preheat oven to 200°C.
  2. Bake the bread buns for 10-12 minutes if unbaked, or heat up for 2-3 minutes if already baked. Take out and let cool slightly on a rack before slicing in half.
  3. Heat up a pan, drizzle a tiny amount of olive oil (about 1 tsp)  and place the mushroom caps, cut side down. Press hard down and let them cook 2-3 minutes on medium heat before turning and cooking another 2 minutes.
  4. At this point the mushrooms are still raw. Put them in an oven proof dish (stem side up so you have a cup), season with salt & pepper, and divide the cheese on top of the mushrooms, making sure it’s inside the cup. Bake in the oven for 10 minutes.
  5. Spread bread with your favourite seasonings.  For me that’s mayonnaise on the bottom, ketchup on the top half. Put a mushroom on each bun, top with some lettuce & tomato slices if desired, cover with the other half of the bun and devour.

If you can’t find big (and by big I mean 12-15 cm in diameter) portobello mushrooms, you can also use the smaller ones. Just make more per person and balance them on the bread bun. 

Makes 2 burgers

Nutritional info is very dependent on what bread you use, how big your mushrooms are, how much mustard, ketchup and mayonnaise you use, etc. We had a burger each with a nice side salad for 485 calories.

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