Easy Vegan Portobello Avocado Steaks

Name: Easy Vegan portobello avocado steaks
Prep time: 5 min
Cook time: 25 min
Ingredients: 2 tbsp Olive Oil; 4 large Portobello Mushrooms; 4 tbsp Vegan Red Pesto; 2 Avocados (mashed with a fork); 4 Oil packed Sundried Tomato halves (chopped); 1 tsp Oregano; ½ tsp Sea salt or Kosher Salt; ⅓ tsp Ground Black Pepper; 2 tbsp Olive Oil; 2 large Yellow Onions (sliced); ½ tsp Salt; ½ tsp Pepper

These easy vegan portobello steaks topped with avocado are out of this world. Featuring juicy meaty textures, tons of flavors, and creamy avocado they are everything summer (and every other season) is about. Make them on the grill, in the oven, or in a frying pan, and eat topped with soft Caramelized onions, in a burger, with a side of fries or mashed potatoes, and a salad. It’s a flavor bomb waiting to happen.

Jump to Recipe

Baked portobello mushrooms are a delicious and nutritious option for anyone looking to add more flavor and variety to their meals. They are low in calories, high in fiber, and packed with essential nutrients like vitamin D and selenium. Plus, their meaty texture and earthy flavor make them a satisfying substitute for meat in many recipes. So whether you’re a vegetarian, a health-conscious foodie, or just looking for a tasty new dish to try, baked portobello mushrooms are definitely worth a try!

These easy vegan portobello avocado-loaded steaks are ready to be the star of your summer…and not just for vegans and vegetarians. It’s a great recipe for any main course meal that always gets a 5 star rating from everyone. Think juicy meaty textures, tender flavor-packed mushrooms topped generously with creamy avocados, rich red pesto, sun-dried tomatoes, and soft Caramelized onions. It’s a plateful of roasted portobello mushrooms deliciousness. Serve these amazing vegan steaks as a main dish at any dinner party. It’s a perfect meatless dinners portobello mushroom steak recipe made with simple ingredients that pack so much flavor.

There’s nothing quite like that first bite of tender meaty mushrooms loaded with umami flavors and topped with red pesto that tastes like sunshine…not to mention the cool creaminess of the avocado that becomes zingy and earthy when it’s heated. It’s a true vegan steak that will satisfy even devout meat lovers.

In this Easy Vegan baked portobello mushrooms avocado steaks recipe we’re covering

Key Ingredients for making Easy Vegan baked portobello mushrooms avocado steaks
How to make the best soft caramelized onions

How to make BBQ Portobello Mushrooms
Easy way to make stuffed baked portobello mushroom steaks
What to serve with portobello mushroom steaks

Ways to serve vegan stuffed portobello mushrooms
How to clean portobello mushrooms
FAQs

We are working with

Today’s ingredient list is short and fabulously flavorful. It doesn’t take a lot to make the best stuffed mushroom recipe. Whether you’re making these tasty stuffed mushrooms in the oven on a rimmed baking sheet, an air fryer or on your outdoor grill it’s a simple process. Let’s dive right into what you need to make (and get at the grocery store) to make these tasty plant-based steaks.

olive oil (you probably already have this in your kitchen)
portobello mushrooms, I like to use large mushrooms, but different types of mushrooms can also work

red pesto (homemade or store-bought)
avocados, mashed with a fork
oil-packed sun-dried tomatoes, chopped

oregano (can be fresh or dried), or use Italian seasoning
salt
black pepper

But we can’t forget about the AMAZING soft Caramelized onions. I can describe these soft onions in one word only; “yum”.

They are decadent, and rich, and add to that real steak feeling. You can’t miss out on this portobello onion combo.

Making soft Caramelized onions is easy. Like, super easy. But it’s one of those extras that will take your vegan steak from great to absolutely delicious. And it requires barely any ingredients.

Let’s look at what you need to make Caramelized onions:

Let’s look at what you need to make Caramelized onions:

Sautéed onions main ingredients

olive oil

yellow onions, sliced
salt
pepper

How to make Caramelized onions step-by-step

Heat olive oil in a pan. Once the pan is hot gently transfer the sliced onions to the pan and stir. Season with salt and pepper and let the onions cook at medium-high heat while stirring occasionally. The onions should cook for 15 minutes or until they are soft, Caramelized in places, and tender. Add extra salt if needed before serving.

Now, let’s take a look at the star of the show. These plant-based mushroom steaks are out of this world…and surprisingly simple to make. Whether you’re making them on the grill or in the oven it’s so simple.

Easy way to Make Baked portobello avocado steaks in the oven

Preheat the oven to 400F.

Clean the portobello mushrooms and place them with the stem side up in a baking pan.
Use a spoon or butter knife to spread a generous layer of red pesto on top of the mushrooms. Cut the avocados in half and carefully remove the stones without cutting yourself. Use a spoon to scrape the avocado meat into a small bowl. Season with oregano, salt, and pepper and use a fork to mash the avocados (there should still be a few lumps left). Next, pour in the chopped sun-dried tomatoes and combine everything.
Spread the avocado mix evenly on top of the mushrooms and drizzle with a finish of olive oil.

Bake the avocados in the oven for 25-minutes or until they are golden on the outside and cooked all the way through to tenderness.
Serve with a topping of soft onions and enjoy.

Making portobello avocado steaks on the grill

Heat the grill.

Clean the portobello mushrooms and place them with the stem side up on a plate.
Use a spoon or butter knife to spread a generous layer of red pesto on top of the mushrooms. Cut the avocados in half and carefully remove the stones without cutting yourself. Use a spoon to scrape the avocado meat into a small bowl. Season with oregano, salt, and pepper and use a fork to mash the avocados (there should still be a few lumps left). Next, pour in the chopped sun-dried tomatoes and combine everything.
Spread the avocado mix evenly on top of the mushrooms and drizzle with a finish of olive oil.

Grill the avocados for 15-20 minutes or until they are grilled golden with darker char marks and cooked all the way through to tenderness.
Serve with a topping of soft onions and enjoy.

What to serve with portobello mushroom steaks

Easy creamy BBQ potato salad

Easy authentic vegan Swedish potato salad

Ways to serve portabella mushrooms

There are so many delicious ways to serve portobello mushrooms. Here are three of my favorites;

As a delicious juicy burger or sliders

Topped on a creamy bed of mashed potatoes
With a side of salad and fries

What can I use to substitute portobello mushrooms

If you’re looking for a substitute for portobello mushrooms in stuffed baked mushroom recipes, there are several other mushroom varieties that work well. One option is cremini mushrooms, which are similar in flavor and texture to portobellos, but smaller in size. Shiitake mushrooms are another good option, as they have a meaty texture and a rich, earthy flavor. Oyster mushrooms are also a great alternative, with a delicate flavor and a unique, fan-shaped appearance that makes them a beautiful addition to any dish. And if you want to get more creative, you could even try using a mix of different mushroom varieties to create a unique and flavorful stuffed mushroom dish.

How to clean a portobello mushroom

To clean a portobello mushroom, start by wiping any dirt or debris off the cap with a damp paper towel or a clean kitchen towel. You can also use a soft-bristled brush to gently remove any dirt that’s stuck to the mushroom. Do not wash the mushrooms under running water as they can absorb water and become mushy. Instead, use a damp cloth or towel to gently wipe the mushrooms clean. If the mushroom has a lot of dirt or debris stuck in the gills, you can use a spoon to scrape it out. Once the mushroom is clean, you can slice, chop, or cook it as desired.

Frequently Asked Questions

Can I use ready-made pesto for this recipe?

Absolutely. You can use any type of pesto you prefer.

What kind of homemade vegan pesto is best?

My personal favorite vegan pesto is the vegan red pesto you can find in my FREE 5 Fave spice mixes + 5 best vegan sauces and dips guide you get when you sign up for my newsletter. It’s THE rich, luxe vegan pesto that I use on EVERYTHING. From sandwiches to these portobello steaks pesto is my go-to.

Can portobello mushrooms be frozen?

Yes. Nearly all mushrooms are freezer friendly. You can freeze these mushroom steaks before or after they are made. Just make sure to heat them all the way through before serving.

I have guacamole. Can I use that instead of mashing avocados?

Absolutely. Guacamole will work just as well as mashed avocados.

Storage and freezing facts

Can you freeze stuffed portobello mushrooms

Yes, you can freeze stuffed portobello mushrooms, but it’s important to keep in mind that the texture of the mushrooms may change slightly once they’re thawed and reheated. To freeze stuffed portobello mushrooms, first, prepare the stuffing as usual and stuff it into the mushroom caps. Then, place the stuffed mushrooms on a baking sheet lined with parchment paper and put them in the freezer for a few hours until they’re frozen. Once they’re frozen, transfer them to a freezer-safe container or bag and store them in the freezer for up to 3 months. When you’re ready to enjoy them, simply thaw them in the fridge overnight and reheat them in the oven or microwave.

How to freeze portobello mushrooms

To freeze portobello mushrooms, first, clean the mushrooms and remove any dirt or debris. Then slice or chop them to your desired size. Next, place the pieces on a baking sheet lined with parchment paper and put them in the freezer for a few hours until they’re frozen. Once they’re frozen, transfer them to a freezer-safe airtight container or plastic bag and store them in the freezer for up to 6 months. When you’re ready to use them, simply thaw them in the fridge overnight and use them as you would fresh mushrooms.

Reheating Facts

How to reheat portobello mushrooms

Reheating portobello mushrooms is a quick and easy process. Here are a few ways you can reheat them:
In the oven: Preheat your oven to 350°F (175°C). Place the mushrooms in a shallow baking dish or on a baking tray and reheat in the oven for 5-10 minutes baking time. This method works best for whole portobello caps or larger pieces.
In the microwave: Place the mushrooms on a microwave-safe dish and heat on high for 30 seconds to 1 minute. Check the mushrooms and continue heating in 15-second increments until they reach the desired temperature.
On the stovetop: Heat a non-stick skillet over medium heat. Add a small amount of oil or cooking spray and place the mushrooms in the skillet. Cook for 1-2 minutes per side, or until heated through.
Grilling or pan-searing: Portobello mushrooms can be reheated on the grill or in a pan. Heat your grill or pan to medium-high heat. Add a small amount of oil or non-stick cooking spray to the grill or pan and place the mushrooms on the heat. Cook for 2-3 minutes per side, or until heated through.

Nutrition Facts

Are portobello mushrooms low carb

Yes, portobello mushrooms are low in carbohydrates and are a great food to include in a low-carb or keto diet. A typical serving of portobello mushrooms (one cup, sliced) contains only about 2-3 grams of net carbs, making them a very low-carb food. Additionally, mushrooms are high in fiber, which can help fill you up and keep you feeling satisfied while also aiding in digestion.
Mushrooms are also a good source of key nutrients like vitamin D, potassium, and selenium, and are very versatile in the kitchen. You can use them in a variety of dishes, from salads to soups to stir-fries, and even as a substitute for high-carb ingredients like pasta or rice in dishes such as mushroom risotto.
Overall, mushrooms are a low-carb, nutrient-dense food that can be a great addition to a healthy diet.

Print Pin