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Mushroom Sandwich with Pickled Onion: A Savory and Tangy Delight

The Mushroom Sandwich with Pickled Onion is a symphony of flavors that brings together the earthy richness of mushrooms and the tangy kick of pickled onions. This sandwich is a satisfying and gourmet-inspired option that’s perfect for those who appreciate a balance of savory and tangy elements.W

ith sautéed mushrooms, zesty pickled onions, and a touch of melted cheese, this sandwich is a treat for your taste buds. In this article, we’ll guide you through creating this flavorful Mushroom Sandwich with Pickled Onion step by step.


To create this delicious Mushroom Sandwich with Pickled Onion, gather:

For the Sandwich

  • 8 slices of your favorite bread (sourdough, whole-grain, ciabatta, etc.)
  • 2 cups mushrooms (button, cremini, or your choice), sliced
  • 1 tablespoon olive oil
  • 1 clove garlic, minced
  • 1 teaspoon fresh thyme leaves (or dried thyme)
  • Salt and black pepper, to taste
  • 1 cup shredded cheese (Swiss, Gouda, cheddar, etc.)
  • Butter or margarine, for grilling

For the Pickled Onion

  • 1 red onion, thinly sliced
  • 1/2 cup white vinegar or apple cider vinegar
  • 1/4 cup water
  • 2 tablespoons granulated sugar
  • 1 teaspoon salt


Preparing the Pickled Onion

In a bowl, combine the white vinegar, water, granulated sugar, and salt. Stir until the sugar and salt dissolve. Add the thinly sliced red onion to the vinegar mixture, ensuring that the onions are fully submerged. Cover the bowl and refrigerate for at least 30 minutes, allowing the onions to pickle.

Sautéing the Mushrooms

In a skillet, heat the olive oil over medium heat. Add the sliced mushrooms and sauté until they are golden brown and tender. Stir in the minced garlic and fresh thyme leaves, and season with salt and black pepper to taste. Remove the mushrooms from the skillet and set them aside.

Assembling the Sandwich

Lay out 8 slices of your chosen bread. On one side of each slice, place a portion of the sautéed mushrooms.

Adding Cheese

Sprinkle a generous amount of shredded cheese on top of the mushrooms. The melted cheese will add creaminess and flavor to the sandwich.

Completing the Sandwiches

Top each sandwich with a slice of bread to complete the sandwich.

Grilling the Sandwiches

Heat a non-stick skillet or griddle over medium heat. Spread a thin layer of butter or margarine on the outside of each sandwich. Place the sandwiches on the skillet and cook until the bread is golden brown and the cheese is melted, flipping them once to ensure even cooking on both sides.

Cutting and Serving

Once the sandwiches are grilled to perfection, remove them from the skillet. Use a sharp knife to cut the sandwiches in half, creating two halves for each sandwich. Serve the Mushroom Sandwich with Pickled Onion halves with a side of your favorite salad or vegetable chips.


In conclusion, the Mushroom Sandwich with Pickled Onion is a flavor-packed option that elevates the humble sandwich to a gourmet experience. From the hearty mushrooms to the tangy pickled onions, each bite offers a delightful blend of textures and tastes.

By following the steps outlined in this article, you’ll be able to create a sandwich that’s not only satisfying but also a delicious fusion of savory and tangy elements.


Can I use a different type of bread for the sandwich?

Absolutely! Choose your preferred type of bread, such as sourdough, whole-grain, or ciabatta.

Can I use a different type of cheese for the sandwich?

Yes, feel free to experiment with your favorite cheeses to create your desired flavor profile.

Can I make the pickled onions in advance?

Yes, you can prepare the pickled onions ahead of time and store them in the refrigerator for up to a week.

Can I add other ingredients to the sandwich, such as greens or spreads?

Of course! You can customize the sandwich with additional ingredients like lettuce, tomatoes, or your favorite spreads.

How should I store leftover sandwiches for freshness?

If you have leftover sandwiches, wrap them tightly in plastic wrap or store them in an airtight container in the refrigerator.