Grilled Portobello Burgers

Name: Grilled Portobello Burgers
Prep time: 15 min
Cook time: 10 min
Total time: 25 min
Yield: 4 servings
Ingredients: 4 large Portobello mushrooms; 1/4 cup balsamic vinegar; 2 tablespoons olive oil; 2 cloves garlic, minced; Salt and pepper to taste; 4 whole-grain burger buns; 1 avocado, sliced; 4 slices of cheese (optional); Grilled onions and tomatoes for topping

Highlighted under: Ready-to-Go Meals

When I first tried grilled Portobello burgers, I was blown away by their rich, meaty flavor. I love how easy they are to prepare yet impressive enough to serve at a backyard barbecue. The trick is to marinate the mushrooms beforehand; it infuses them with savory depth that makes each bite a delight. Paired with fresh toppings like grilled onions and avocado, these burgers deliver a delicious, satisfying meal that's perfect for vegetarians and meat-lovers alike. Let's fire up the grill and create some magic!

Created by

Bethany Clarke

Last updated on 2026-02-07T23:57:36.393Z

I remember the first time I experimented with Portobello mushrooms on the grill; the aroma was intoxicating. I learned that marinating them in balsamic vinegar and garlic adds a fantastic depth of flavor that enhances their natural umami. The key is to let them soak up the marinade for at least 30 minutes before grilling, which ensures that every bite is full of flavor.

Another thing I've discovered is that while grilling, you must keep an eye on the mushrooms to prevent them from drying out. A gentle brush of olive oil before flipping helps retain moisture. My favorite topping is creamy avocado; its richness pairs beautifully with the smoky Portobello!

Why You'll Love These Burgers
Meaty texture that satisfies even the hungriest carnivores
Simple ingredients that come together quickly
Loaded with flavor from the marinade and toppings

Mastering the Marinade

The marinade for these Portobello burgers plays a crucial role in enhancing the mushrooms' natural umami flavor. By combining balsamic vinegar with olive oil, garlic, salt, and pepper, you're creating a balance of acidity and richness. Ensure the mushrooms are fully coated in the marinade; you can use a resealable plastic bag for even distribution. Marinate for at least 30 minutes, but if you have time, letting them soak for an hour or more will yield even richer flavors. Just be mindful not to exceed 2 hours, as excessive marination can lead to a mushy texture.

When marinating, consider adding dried herbs like oregano or thyme for extra depth. Fresh herbs work well too but should be added just before grilling to prevent them from wilting. If you're sensitive to vinegar, a splash of soy sauce can be substituted for a similar depth with less acidity. Experiment with your marinade to find the perfect balance that suits your taste—just remember to stick to elements that complement the earthy flavor of Portobello mushrooms.

Grilling Techniques

Grilling these Portobello mushrooms requires close attention to heat levels. Preheat your grill to a medium-high temperature, around 400°F to 450°F, ensuring the grates are clean and lightly oiled to prevent sticking. Place the marinated mushrooms stem-side up on the grill, allowing them to cook undisturbed for about 5 minutes. This resting period develops a lovely char and releases a robust, meaty flavor. Flip them gently using a spatula, taking care not to pierce the mushrooms, which can cause the juices to escape.

If you're adding cheese, switch it up by using smoked gouda or pepper jack to enhance the flavor profile. For those who prefer a vegan option, try nutritional yeast sprinkled on top just before serving. Pay attention to cooking times: aim for that perfect tender consistency, which means you should be able to press the mushroom gently without resistance. If they become too soft, it’s a sign they are overcooked, so keep an eye on the clock!

Ingredients

For the burgers

4 large Portobello mushrooms
1/4 cup balsamic vinegar
2 tablespoons olive oil
2 cloves garlic, minced
Salt and pepper to taste
4 whole-grain burger buns
1 avocado, sliced
4 slices of cheese (optional)
Grilled onions and tomatoes for topping

Instructions

Prepare the mushrooms

In a bowl, whisk together balsamic vinegar, olive oil, minced garlic, salt, and pepper. Marinate the Portobello mushrooms in this mixture for at least 30 minutes.

Preheat the grill

Heat the grill to medium-high. Ensure the grates are clean and lightly oiled.

Grill the mushrooms

Place the marinated mushrooms on the grill, cooking for about 5 minutes on each side, or until tender. If using cheese, add it on top during the last minute of cooking.

Assemble the burgers

Toast the burger buns on the grill. Layer each bun with a grilled Portobello mushroom, slices of avocado, grilled onions, and tomatoes. Top with the other half of the bun.

Pro Tips

For added flavor, consider grilling some pineapple slices alongside the mushrooms. The sweetness pairs wonderfully with the savory burgers.

Serving Suggestions

These grilled Portobello burgers are wonderfully versatile when it comes to toppings. While simple avocado and grilled onions provide a delightful contrast, you can also add fresh arugula or a tangy hot sauce to enhance the experience. For a gourmet twist, consider a dollop of garlic aioli or a spread of pesto on the buns. Customize your toppings to match the season; grilled peaches or mango can add a touch of sweetness in summer, while roasted red peppers are a flavorful winter option.

Pair your burgers with sides like sweet potato fries or a crisp salad for a complete meal. A cold craft beer or homemade lemonade complements the robust flavors nicely and can elevate your backyard barbecue to the next level.

Make-Ahead Tips

Preparation is key for hosting a successful barbecue. You can marinate the Portobello mushrooms the night before and store them in the refrigerator. Once they’re marinated, they can also be grilled and stored in an airtight container for up to 3 days. Just warm them quickly on the grill or in a skillet before serving. This method allows those vibrant flavors to meld even more as they sit.

If you have leftover grilled mushrooms, I highly recommend making a delicious mushroom salad or adding them to a pasta dish the next day. Simply slice the mushrooms and toss them with your favorite greens, nuts, and a light vinaigrette for a quick and satisfying meal.

Questions About Recipes

→ Can I make these burgers ahead of time?

Yes, you can marinate the mushrooms a few hours in advance. Just grill them right before serving!

→ Are Portobello mushrooms healthy?

Absolutely! They are low in calories, a good source of fiber, and packed with antioxidants.

→ What can I substitute for the cheese?

If you want a non-dairy option, try avocado slices or vegan cheese for a creamy texture.

→ Can I use different types of mushrooms?

Sure! Just ensure they are large enough to hold up as a burger alternative.