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; 3 cloves garlic, minced; Salt and pepper to taste; 4 whole grain burger buns; 1 avocado, sliced; Leafy greens (like arugula or spinach); Smoky chipotle mayo (optional)

Highlighted under: Favorite Comfort Food Ideas

I absolutely love making Grilled Portobello Burgers, especially during summer barbecues. The rich umami flavor of the mushrooms, combined with smoky grill marks, creates a delightful alternative to traditional meat burgers. I usually marinate the Portobellos in a mix of balsamic vinegar and garlic, which infuses them with flavor and enhances their natural juiciness. These burgers are not only hearty, but they’re also surprisingly easy to prepare, making them a favorite at family gatherings and get-togethers with friends.

Created by

Genevieve Porter

Last updated on 2026-02-08T08:53:36.428Z

When I first tried a Portobello burger years ago, I was completely blown away by its meaty texture. I thought, 'How can a mushroom taste this amazing?' I discovered that marinating Portobellos brings out their best flavors and softens them just enough to become a perfect substitute for beef patties. This method works exceptionally well!

I love experimenting with different toppings, like avocado and smoky chipotle mayo, to make them even more exciting. This recipe is always a hit with vegans and meat-lovers alike—proof that great flavor transcends dietary choices!

Why You'll Love These Burgers
Juicy Portobello mushrooms that satisfy even the hungriest of appetites
Versatile—perfect with a variety of toppings and sauces
Quick and easy to make, ideal for any weeknight dinner or gathering

Understanding Portobello Mushrooms

Portobello mushrooms are not just a meat alternative; they bring a unique flavor profile to any dish. Their natural umami richness makes them perfect for grilling, as the heat intensifies their taste and texture. When selecting Portobellos, look for mushrooms that are firm to the touch and have a rich, dark color. Avoid any that are slimy or have blemishes, as these could indicate spoilage. The larger the cap, the better they are for burgers, providing a satisfying bite.

The marinating process is crucial for developing flavor depth. Balsamic vinegar not only enhances the Portobellos' earthy tones but also acts as a tenderizer. Allow the mushrooms to marinate for at least 15 minutes—this is the minimum time required to allow the marinade to penetrate the flesh. For added complexity, consider incorporating herbs like thyme or rosemary into the marinade for a subtle aromatic element.

Grilling Tips for Perfect Texture

When grilling the marinated Portobellos, ensure your grill is properly preheated to medium-high heat—this typically ranges from 375°F to 400°F. A hot grill creates those coveted smoky grill marks and caramelizes the natural sugars in the mushrooms. Cook each side for approximately 5 minutes, checking for tenderness; they should yield easily when pressed with a spatula. If they start to look too charred, adjust the grill temperature slightly to maintain a steady cooking environment.

To preserve moisture and prevent dryness, keep an eye on the grilling time. Overcooking can lead to rubbery mushrooms, losing that juicy texture. If necessary, baste the mushrooms with some extra marinade while grilling to add a layer of flavor and moisture, enhancing the overall juiciness. If you're short on time, consider using a grill basket or aluminum foil to make flipping easier and to catch drippings.

Ingredients

Gather these ingredients to make your delicious Grilled Portobello Burgers.

For the Burgers

4 large Portobello mushrooms
1/4 cup balsamic vinegar
2 tablespoons olive oil
3 cloves garlic, minced
Salt and pepper to taste
4 whole grain burger buns
1 avocado, sliced
Leafy greens (like arugula or spinach)
Smoky chipotle mayo (optional)

Make sure to have these fresh ingredients on hand for the best flavors!

Instructions

Follow these steps to create your tasty Grilled Portobello Burgers.

Prepare the Marinade

In a small bowl, whisk together balsamic vinegar, olive oil, minced garlic, salt, and pepper.

Marinate the Mushrooms

Place the Portobello mushrooms in a shallow dish and pour the marinade over them. Let them soak for at least 15 minutes.

Preheat the Grill

Preheat your grill to medium-high heat.

Grill the Mushrooms

Once the grill is hot, place the marinated Portobellos on the grill and cook for about 5 minutes on each side, or until tender.

Assemble the Burgers

Place the grilled mushrooms on whole grain buns, add sliced avocado, leafy greens, and a dollop of smoky chipotle mayo, if desired.

Enjoy your Grilled Portobello Burgers with your favorite sides!

Pro Tips

For extra flavor, try adding cheese or additional toppings like roasted peppers or sautéed onions.

Serving Suggestions

These Grilled Portobello Burgers shine with various toppings. While sliced avocado adds creaminess, consider complementing the flavors with pickled red onions or fresh herbs like cilantro or basil for a fresh twist. If you want a bit of crunch, top them with cucumber slices or shredded carrots. For a zesty kick, a squeeze of lime juice right before serving could elevate the taste further.

If you're hosting a barbecue, serve these burgers alongside a spread of condiments such as BBQ sauce, mustard, or spicy ketchup. A vibrant salad featuring mixed greens, cherry tomatoes, and a lemon vinaigrette pairs excellently with the richness of the mushrooms. Offering a variety of sides will keep the meal exciting and accommodate diverse tastes.

Make-Ahead and Storage Tips

Preparing ingredients ahead of time can streamline your cooking process. You can marinate the Portobello mushrooms in advance and store them in the refrigerator for up to 24 hours before grilling. This not only saves time on the day of your barbecue but also allows for even more flavor infusion. Just make sure to keep them covered to prevent any contamination from other foods.

If you have leftover grilled mushrooms, store them in an airtight container in the fridge for up to three days. They can be reheated on a skillet over medium heat until warmed through, or added cold to salads or grain bowls for an easy lunch. For longer storage, consider freezing them. Place the cooled grilled mushrooms in a freezer-safe bag, removing as much air as possible, for up to two months. Thaw in the refrigerator before using.

Questions About Recipes

→ Can I make these burgers vegan?

Yes! Just skip the smoky chipotle mayo or use a vegan mayo alternative.

→ How do I store leftover burgers?

Store any leftovers in an airtight container in the fridge for up to 3 days.

→ Can I grill these mushrooms indoors?

Absolutely! A grill pan on the stove works well for achieving that charred flavor.

→ What sides pair well with Portobello burgers?

Fresh salads, sweet potato fries, or grilled vegetables make excellent sides.