Sliders with Grilled Portobello Mushrooms

Name: Sliders with Grilled Portobello Mushrooms
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; 1 teaspoon garlic powder; 1 teaspoon dried oregano; Salt and pepper to taste; 4 slider buns; Toppings of your choice (lettuce, tomato, avocado, aioli, etc.)

Highlighted under: Everyday Inspiration

I love creating sliders that are both delicious and satisfying, and these sliders with grilled Portobello mushrooms are a perfect example. The meaty texture and rich flavor of the mushrooms transform this dish into a gourmet experience. Paired with fresh toppings and a delicious sauce, they make for an excellent meal option that's easy to prepare. Whether you’re hosting a gathering or just looking for a filling lunch, these sliders are sure to be a hit.

Created by

Olwen Bradford

Last updated on 2026-01-05T20:21:35.623Z

After several attempts at perfecting mushroom-based sliders, I discovered that grilling Portobello mushrooms gives them an incredible smoky flavor that elevates the dish. To get the most out of these mushrooms, I marinate them in balsamic vinegar and herbs for a few hours before grilling. This infuses them with flavor while also keeping them moist during cooking.

During one of our family get-togethers, I served these sliders alongside a variety of toppings, including avocado and spicy aioli. The response was overwhelmingly positive! People loved customizing their own sliders, and it made the meal feel even more special. I've found that serving them with a side of sweet potato fries makes for an unbeatable combo!

Why You'll Love These Sliders
Hearty and savory grilled flavor from the Portobello mushrooms
Endless topping options to personalize your sliders
Quick to prepare, making it perfect for a weeknight meal or get-together

Choosing the Right Portobello Mushrooms

When selecting Portobello mushrooms for your sliders, look for specimens that are firm and have a smooth, unblemished surface. The cap should be large, about 4 to 6 inches in diameter, and not too dry or cracked. Fresh mushrooms will also have a rich, earthy aroma, which is essential for maximizing flavor during grilling. Avoid those that appear shriveled or slimy, as they may have started to spoil.

For an enhanced flavor experience, consider sourcing your mushrooms from local farmers’ markets or specialty stores. Organic Portobellos often come with a fresher taste and are free from harmful pesticides. If you can’t find Portobello mushrooms, shiitake or cremini can be decent substitutes, but they have different textures and flavors, so keep that in mind when preparing your sliders.

Mastering the Marinade

The marinade in this recipe is crucial for imparting a robust flavor to the Portobello mushrooms. Balsamic vinegar not only tenderizes the mushrooms but also adds a touch of sweetness that balances their inherent earthiness. Make sure to whisk the marinade ingredients until they are well-blended; a uniform mixture ensures that every mushroom absorbs the flavors evenly. If time permits, marinating for an extended period (up to 1 hour in the fridge) can deepen the flavors significantly.

While this recipe calls for garlic powder and dried oregano, feel free to experiment with your favorites. Fresh herbs like thyme or rosemary can add a wonderful herbal note, and spices like smoked paprika can introduce some warmth and smokiness, elevating the overall taste profile. Just remember to keep the balance, as overpowering one element can mask the delightful essence of the mushrooms.

Ingredients

Gather all your ingredients before you start for an easy cooking experience!

For the Sliders

4 large Portobello mushrooms
1/4 cup balsamic vinegar
2 tablespoons olive oil
1 teaspoon garlic powder
1 teaspoon dried oregano
Salt and pepper to taste
4 slider buns
Toppings of your choice (lettuce, tomato, avocado, aioli, etc.)

Once you have everything ready, let’s move on to the cooking!

Instructions

Follow these steps to create the perfect sliders!

Marinate the Mushrooms

In a bowl, whisk together balsamic vinegar, olive oil, garlic powder, oregano, salt, and pepper. Add the Portobello mushrooms, ensuring they are well-coated. Let them marinate for at least 15 minutes.

Grill the Mushrooms

Preheat your grill over medium heat. Grill the marinated mushrooms for about 5 minutes on each side or until they are tender and have nice grill marks.

Assemble the Sliders

Slice the buns and place a grilled Portobello mushroom on each bun. Add your favorite toppings, such as lettuce, tomatoes, or avocado, and finish with a dollop of aioli.

Enjoy your homemade sliders with a side of your favorite fries!

Pro Tips

For an added layer of flavor, consider adding some smoked cheese on top of the mushrooms while they grill.

Serving Suggestions

These sliders can be served with a variety of sides to create a complete meal. For a fresh contrast, you might pair them with a crisp side salad or sweet potato fries. If you're feeling adventurous, a homemade coleslaw can add a delightful crunch and zest.

To elevate the experience further, why not create a small slider bar? Set out an assortment of toppings such as pickled red onions, jalapeños, and various sauces like sriracha mayo or pesto, allowing guests to customize their sliders. This interactive style can add fun to your gathering while showcasing your culinary creativity.

Storage and Make-Ahead Tips

If you have any leftover grilled Portobello mushrooms, store them in an airtight container in the refrigerator for up to 3 days. Reheat them in a skillet over low heat for a quick meal addition or incorporate them into pasta dishes, salads, or grain bowls. This versatility makes any leftovers a fantastic component in various dishes.

For meal prepping, you can marinate the mushrooms ahead of time—just remember to keep them in the refrigerator until you're ready to grill. This marinating step can be done a day in advance, saving you time on busy days while still delivering fantastic flavor. Just be cautious not to marinate for too long, as the vinegar can start to break down the mushrooms too much, leading to mushiness.

Questions About Recipes

→ Can I use button mushrooms instead of Portobello?

You can, but the texture and flavor of Portobello mushrooms work best for sliders.

→ How do I store leftovers?

Store any leftover sliders in an airtight container in the refrigerator for up to 2 days.

→ Can I make these sliders vegan?

Yes! Simply use vegan buns and aioli to keep the recipe completely plant-based.

→ What are some good side dishes to serve with these sliders?

Sweet potato fries, a fresh salad, or grilled vegetables pair wonderfully with these sliders.