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American Recipes
Mega Mushroom Burgers

Mega Mushroom Burgers

with Avocado, Caramelized Onion, and Spicy Mayo

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Rated 3.2 / 4out of 970 ratings
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Portobellos are nothing short of perfect on a bun: they’ve got the right burger size and shape, a meaty texture, and a deep, intense flavor. Dress them with a little balsamic, like we’ve done here, and you’ve got a tangy veggie burger masterpiece. And when you add a bit of avocado, onion, and spicy mayo on top and serve them with a salad on the side, it becomes a supremely satisfying meal.

Tags:Spicy
Allergens:EggsWheatMilk

Produced in a facility that processes milk, eggs, fish, shellfish, tree nuts, peanuts, wheat, and soybean.

Preparation Time30 minutes
Cooking difficultyLevel 1
Ingredients
serving amount
Ingredientsarrow down iconarrow down icon
serving amount

2

Portobello Mushrooms

2

Arugula

1

Roma Tomato

1

Yellow Onion

1

Avocado

2

Mayonnaise

(ContainsEggs)

2

Hot Sauce

2

Balsamic Vinegar

2

Potato Bun

(ContainsEggs, Wheat, Milk)

Not included in your delivery

4

Olive Oil

Salt

Pepper

Nutrition Values/ per serving
Nutrition Valuesarrow down iconarrow down icon
/ per serving
Energy (kJ)2678 kJ
Calories640 kcal
Fat40 g
Saturated Fat7 g
Carbohydrate62 g
Sugar15 g
Dietary Fiber11 g
Protein13 g
Cholesterol15 mg
Sodium490 mg
Due to the different suppliers we purchase our products from, nutritional facts per meal can vary from the website to what is received in the delivered box, depending on your region.
Utensils
Utensilsarrow down iconarrow down icon
Small Bowl
Large Pan
Instructionsarrow up iconarrow up icon
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Prep and Make Spicy Mayo
Prep and Make Spicy Mayo
1

Wash and dry all produce. Peel onion, then thinly slice crosswise and separate into rings. Slice tomato into thin rounds. In a small bowl, combine mayonnaise and hot sauce (to taste).

Cook Onion
Cook Onion
2

Heat a drizzle of olive oil in a large pan over medium heat. Add onion and cook, tossing, until softened and browned, 4-5 minutes. Season with salt and pepper. Remove from pan and set aside.

Cook Mushrooms
Cook Mushrooms
3

Rub mushrooms all over with a large drizzle of olive oil. Season with salt and pepper. Add to same pan over medium heat. Cook until just tender, 4-5 minutes per side. Pour 1½ TBSP balsamic vinegar into pan (we sent more) and cook until reduced by half. Toss to coat mushrooms, then remove from pan and set aside.

Toast Buns
Toast Buns
4

Wash and dry same pan, then return to stove over medium heat. Split buns in half down center. Add to pan cut side down. Toast until golden brown, 3-4 minutes.

Mash Avocado
Mash Avocado
5

Halve, pit, and scoop flesh from avocado, then roughly chop. Place in a small bowl, then mash with a fork until mostly smooth. Season with salt and pepper.

Make Salad and Serve
Make Salad and Serve
6

In a medium bowl, toss arugula, a drizzle of olive oil, remaining balsamic vinegar, and a pinch of salt and pepper. Spread spicy mayo on buns, then add a mushroom to each bun. Top with tomato, onion, and avocado. Serve with salad to the side.