Portobello Pizza
Portobello pizza swaps the dough for a roasted portobello mushroom cap, so you get all the melty, saucy, herby joy of pizza in a low-carb, gluten-free package. You par-bake the caps, load them with pizza sauce, spinach, cherry tomatoes and shallots, then finish with mozzarella and Parmesan (dairy or vegan, your call). It comes together in well under an hour and makes a satisfying light meal or a fun party bite.
Have you ever been at a party and someone asked you “if you could only eat one thing for the rest of your life, what would it be?” Most people list their favorite dish, but I think that’s actually pretty counter-intuitive. I’ve always said pizza, and not just because it’s delicious. Think about it: you have an infinitely customizable dish, popular all over the world, that you can top with whatever you like, and it even has countless vegan options.
And then you might ask, “but doesn’t that mean a whole lot of carbs since you’re always having crust?” Well, think again! Today’s recipe is me trying to show you a cool new way to diversify your diet, meanwhile subtracting nothing more from your favorite pizza than the dough itself. What if you can make smaller, healthier pizzas that are as tasty as the usual ones? Am I starting to make sense here?
What you’ll need for portobello pizza
The ingredient list is short and forgiving. A few notes to help you shop and prep:
- Portobello mushrooms – the whole point. Choose large, firm caps with tightly closed gills and no slimy spots. Bigger caps hold more toppings and are easier to fill.
- Tomato pizza sauce – a good, thick pizza sauce carries most of the flavor here, so pick one you actually enjoy eating.
- Yellow cherry plum tomatoes and fresh spinach – these add color, freshness and a little juiciness. Halving the tomatoes helps them soften and caramelize.
- Shallots – finely chopped, they melt into the sauce with a mellow, sweet onion flavor.
- Mozzarella and Parmesan – dairy or vegan, whichever suits your diet. I would advise heavy experimentation on the vegan cheese side: smoked tofu and cashew cheese might work better here than a store-bought melt.
- Olive oil, dried oregano, fresh basil, salt and pepper – the oil helps the caps roast, the oregano gives that classic pizzeria aroma, and the basil goes on at the very end so it stays bright.
How to keep your mushroom “crust” from going soggy
Portobellos hold a surprising amount of water, and that’s the one thing that can turn your pizza into a puddle. This recipe handles it in two smart ways. First, you scoop out the soft inner gills, which is where a lot of the moisture and the muddy flavor sit. Second, you par-bake the caps oil-side down for about 7 minutes before adding any toppings. That initial roast drives off water and starts to concentrate the mushroom flavor, so the cap can act like a sturdy little crust instead of a sponge.
Adding the cheese only in the last five minutes matters too. If you pile it on too early, it either overcooks or releases so much liquid that everything below it stays wet. Layering the sauce, veg and herbs first, then crowning with cheese near the end, gives you a melty top and a firmer base.
Step-by-step tips for the best result
- Preheat properly. A fully hot 200 C / 400 F oven is what gives you roasting rather than steaming.
- Don’t skip the scoop. Removing the stem and the soft inside makes room for toppings and cuts the excess moisture.
- Brush, don’t drown. A single tablespoon of olive oil across both caps is plenty; too much oil pools and fries rather than roasts.
- Watch the final cheese stage. Five minutes is usually enough to melt; if you want browning, a quick blast under the broiler at the very end does it fast.
- Season the veg. A pinch of salt and pepper over the tomatoes and spinach before the second bake wakes everything up.
Make it your own: toppings and variations
This is why I love portobello pizza so much: it keeps everything you love about pizza and only subtracts the dough. Because the cap is a blank canvas, you can lean in whatever direction you’re craving. Sometimes I prefer to use cashew cheese and herbs, sometimes cherry tomatoes, other times I just put the classic vegan mozzarella and I love it either way. If you want that stretchy, pull-apart melt, try making your own stretchy vegan mozzarella, or browse more vegan cheese recipes to find a favorite.
I usually prefer a lighter kind of portobello pizza, but don’t let that stop you from achieving your pizza dreams. Swap the spinach for arugula, add roasted peppers or olives, or slide some caramelized onions under the cheese. If you’re the type who wants an actual base under your toppings, I have plenty of other vegan pizza recipes to explore, from a cauliflower pizza crust to a quick veggie pita pizza. And if you loved stuffing these caps, you’ll enjoy classic stuffed portobello mushrooms too.
What to serve with portobello pizza
Because these caps are light, they play nicely as either a main or a shareable starter. Sharing is caring, and there’s nothing I enjoy more than cooking for my friends, so I like to set out a couple of these alongside a big salad and maybe a bowl of something dippable. If you’re building a bigger Italian-style spread, round the table out with a doughier pizza for the crust lovers, so everyone gets their pizza dreams met at once.
Storage and make-ahead
Portobello pizzas are best eaten fresh from the oven, while the cheese is still melty and the cap still has some structure. That said, leftovers keep in an airtight container in the fridge for up to two days. Because the mushrooms release moisture as they sit, reheat them in a hot oven or air fryer rather than the microwave, which tends to make them limp and watery. You can also prep ahead by scooping and par-baking the caps earlier in the day, then adding the toppings and finishing the bake right before serving.
Experimentation leads to the best things in food, which is how I suppose portobello pizza was first invented, so I wholeheartedly hope you’ll enjoy making these special pizzas. If you try them, please rate the recipe below and leave a comment telling me which cheese you went with and whether these little caps convinced you to switch from regular pizza. 🙂
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Portobello Pizza
Ingredients
- 2 Portobello mushrooms large
- ½ cup yellow cherry plum tomatoes halved
- ½ cup spinach fresh
- 4 Tbsp tomato pizza sauce
- 2 Tbsp shallots finely chopped
- 1 Tbsp olive oil
- 2 Tbsp mozzarella vegan or dairy
- 1 tsp oregano dried
- 1 Tbsp Parmesan cheese vegan or dairy
- fresh basil leaves for topping
- salt and pepper to taste
Instructions
- Preheat the oven to 200°C (400°F). Line a baking tray with baking paper.
- Twist out the mushroom stems, then use a tablespoon to scoop out the soft gills from inside the caps.
- Brush the scooped side of the mushrooms with olive oil, place them on the baking tray oiled side down and bake for about 7 minutes.
- Take the mushrooms out, turn them cut side up and top with the tomato sauce, chopped shallots, dried oregano, spinach leaves and tomato halves. Season with salt and pepper.
- Bake for about 15 minutes, then sprinkle with the mozzarella and Parmesan and return to the oven for 5 more minutes, until the cheese has melted.
- Scatter fresh basil leaves on top and serve warm.
Notes
Frequently Asked Questions
It can be. The recipe uses mozzarella and Parmesan that you can make either dairy or vegan, so it is vegetarian as written and fully vegan when you choose plant-based cheeses. Everything else, from the mushroom caps to the sauce, spinach, tomatoes and shallots, is already plant-based.
Yes. Swapping the dough for a roasted portobello cap removes the main source of carbs in pizza, leaving mostly vegetables and cheese. That makes it a naturally low-carb, gluten-free option that fits well into a keto-style meal, especially if you keep an eye on your sauce and cheese choices.
Scoop out the soft gills and stem so the caps hold less water, then par-bake them oil-side down for about 7 minutes before adding any toppings. This first roast drives off moisture and concentrates the flavor. Adding the cheese only in the last five minutes also helps keep the base from turning wet.
No, you do not need to peel them. Just wipe the caps clean with a damp cloth or paper towel, remove the stem, and scoop out the dark gills with a spoon. The outer skin roasts up fine and helps the cap keep its shape as your crust.
For a vegan version, cashew cheese and herbs, homemade stretchy vegan mozzarella, or crumbled smoked tofu all work well and often melt or roast better here than some store-bought cheeses. You can also skip the melty cheese entirely and finish with a sprinkle of nutritional yeast for a savory, cheesy note.
Partly, yes. You can scoop and par-bake the caps earlier in the day, then add the sauce, veg and cheese and finish the bake right before serving. Fully baked pizzas keep in the fridge for up to two days and reheat best in a hot oven or air fryer rather than the microwave, which makes them watery.
So yummy and light! Why didn’t I think of this before? 🙂 Thanks for the recipe, you are amazing!
You’re welcome! So happy you liked the recipe!