Here’s how to make a portobello mushroom burger that everyone loves: grilled or roasted! Savory and meaty, it’s irresistible with cheese and special sauce.

Oh, hello. Meet: your perfect portobello mushroom burger. This giant meaty mushroom is irresistible on is own. But add it to a burger bun and pile it high with toppings, and it’s downright outrageous! So you can make it in any season, we’ve got two methods: grilled or roasted. We prefer it as a vegetarian grill recipe eaten on the patio with the wafting smell of charcoal…but that’s just us! It’s fantastic in any season. Here are all the tricks to the very best portbello mushroom burger (we think).

Love portobellos? Try these delicious Stuffed Portobello Mushrooms or all our Portobello Recipes.

Make a portobello mushroom burger: grilled or roasted!

To get the very best portobello mushroom burger there is, we think the grill is the number 1 method. But if it’s not summer and you want to make it too: roasting is nearly as tasty. Here’s a breakdown on both methods:

• Grilled portobello burger: You’ll use our Grilled Portobello Mushrooms method: grill those babies for about 15 minutes at medium high heat. Start with the gill side up, so when you flip all the extra liquid goes into the grates.
• Roasted portobello burger: You need only 15 minutes at 450 degrees Fahrenheit to roast up your mushrooms! Make sure to drain the extra liquid. Sometimes we like to add a few shakes of liquid smoke before roasting to emulate a grilled flavor. Just be careful not to overdo it!

Two important things to know about portbello burgers

The key to the perfect portobello mushroom burger is the toppings. An important thing to keep in mind: portobello mushrooms have a soft texture. Sometimes they can get a little lost in the bun. This is why the toppings are so important. They add contrasting textures to make for a satisfying sandwich.

Another thing: portobello mushrooms are not filling! Because you’re using them in place of a protein, you’d think that they’d be just as filling as burger. Nope! A portobello mushroom burger is not filling unless you add toppings that have some protein. That’s why we like to load ours with cheese…

Load on toppings to add texture and keep it filling!

With those two things in mind, you can construct a portobello mushroom burger that has texture and is filing! Here are the toppings that we chose — but of course, you can get creative and use whatever you’d like:

• Lots of cheese! To keep it filling, we like to add lots of cheese (two slices). Substitute your favorite vegan cheese for a plant-based sandwich.
• Crunchy veggies: Lettuce and red onion help to add texture and crunch
• Tomato: Because it’s just good.
• Sauces: It’s also important to add some great sauces to amp the flavor. We like adding Basil Pesto because it’s garlicky (optional), and then of course our Special Burger Sauce that’s super tangy, creamy and savory all at once.

Top with special sauce

This Special Burger Sauce we created just for these portobello mushroom burgers! Veggie burgers in particular need good sauces, because they can be dry or bland without them. This burger sauce is like all your favorite burger condiments in one, and tastes a little like a Big Mac sauce. Here’s what’s in it:

• Organic ketchup
• Mayonnaise
• Mustard (either yellow or Dijon)
• Pickle juice
• Hot sauce

What to serve with portobello mushroom burgers

These portobello mushroom burgers are a great summer vegetarian recipe and vegan dinner idea! There are lots of sides that go well with burgers: here are some of our favorites:

• Fries! Try our Baked Fries, Sweet Potato Fries or Parmesan Truffle Fries
• Grilled potatoes. Try Grilled Potatoes, Grilled Baked Potato or Grilled Sweet Potatoes.
• Coleslaw. Try Creamy Coleslaw, Vinegar Coleslaw, Mexican Coleslaw, Red Cabbage Slaw, or Broccoli Slaw.
• Corn. Try Grilled Corn 3 Ways: perfect corn on the grates, corn in foil, or corn in husk.
• Bean salad. Loaded with plant-based protein, so it’s perfect for making a filling meal. Try Easy Bean Salad.
• Potato salad. Try Creamy Potato Salad, French Potato Salad, or Dill Potato Salad.

More great veggie burgers

There are lots of other great ways to make a veggie burger! Try them all:

• Best Veggie Burger This mouthwatering veggie burger is slathered with barbecue sauce and doesn’t fall apart on the grill! It’s truly the best you’ll find.
• Best Chickpea Burgers A hugely satisfying plant-based dinner! Here they’re painted with BBQ and served topped with vegan bacon and spicy mayo.
• Black Bean Burger Bursting with flavor! Top with special sauce for a treat.
• Falafel Burger Easy to make and healthier than traditional falafel! Serve with or without a bun, topped with any sauce you like.