A whole portobello cap stands in for the patty, and the key is scoring and marinating it so it drinks up flavor, then grilling gill-side up first to keep the juices in. Cook it long enough that it goes from spongy to tender and it eats like a steak.
By Vince Gonzalez · Published July 2026 · Sourcing verified 5 Jul 2026
Prep15 min
Cook15 min
Makes4 burgers
CuisineAmerican
Cost$
VegetarianGluten-free
Contains dairy
Make it vegan: use plant milk, oil, or a vegan cheese for the dairy.
The Ingredients — and where to get them
Cook for4burgers
Portobello mushroom caps
Large firm caps are the patty; wipe them clean and scrape the gills if you want less liquid.
Can you make Portobello Burger in an air fryer? — Sometimes
Sometimes — if the pieces are small and cooked dry, an air fryer can handle it in a single layer; anything saucy or liquid needs a pan. When in doubt, the stovetop or oven is the safe call.
Can you freeze Portobello Burger? — Yes
Yes — cool it, portion into airtight containers, and freeze; thaw in the fridge and reheat.
Can you make Portobello Burger ahead of time? — Yes
Yes — it holds well and often tastes better the next day. Make it ahead and reheat gently before serving.
Is Portobello Burger gluten-free? — Yes
Yes — nothing in this recipe as written contains gluten. As always, glance at the labels on any packaged items (broth, sauces, chocolate), since brands vary.
Is Portobello Burger vegan? — Vegetarian, not vegan
It’s vegetarian but not vegan as written — it has dairy. Make it vegan: use plant milk, oil, or a vegan cheese for the dairy.
Community Notes
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