Swiss Mushroom Burgers

 Swiss Mushroom Burgers (Quick & Easy)

Juicy beef patties, melty Swiss cheese, and savory sautéed mushrooms — all packed into a soft bun. This is the kind of no-fuss, high-flavor burger you can throw together fast but crave for days.

Swiss Mushroom Burgers (Big, Juicy & Vegetarian!)

These Swiss Mushroom Burgers are bold, juicy, and so satisfying, you might do a double take—they look just like beef burgers! Quicker to whip up than my classic veggie patties, these meat-free marvels feature large mushrooms roasted in garlic butter, topped with melted Swiss cheese, and stacked in soft, fully loaded buns.

They’re a brilliant way to make use of portobello or BBQ flat mushrooms. Can’t find giant mushrooms? No problem—just use smaller ones and stack them for the same mouthwatering result!

Why You’ll Love These Mushroom Burgers

I’m a burger lover through and through—and whether it's meat or veg, it needs to meet a few essential criteria:

• Juicy ✔️

• Meaty ✔️

• Satisfying ✔️

• A bite of burger in every mouthful (no lonely buns here!) ✔️

These mushroom burgers tick every box—and best of all, there's no patty-forming mess. Just roast, stack, and serve. It’s a fast, fuss-free meal packed with flavor.

What You’ll Need

Key Ingredients:

• Mushrooms: Use large varieties like portobello or BBQ flat mushrooms. Aim for ones slightly bigger than your buns—they’ll shrink about 20% when roasted. No big mushrooms? Use multiple smaller ones.

• Swiss Cheese: Melty and flavorful, but feel free to sub in cheddar, gruyère, Colby, jack, or any good melting cheese. (Mozzarella melts well but lacks flavor.)

• Garlic Butter: For that rich, savory punch.

• Olive Oil: Helps prevent the butter from burning at high roasting temps.

• Buns: I love brioche for their buttery softness, but any soft burger roll works. Just make sure the size fits your mushrooms.

Pro Tip: Homemade buns make it extra special. No yeast on hand? Try my [No Yeast Sandwich Bread].

Can I Use Smaller Mushrooms?

Yes! If all you have are regular button or Swiss brown/cremini mushrooms:

1. Slice them up.

2. Sauté in garlic butter.

3. Form into mounds.

4. Top with cheese and melt.

5. Load onto buns. Done!

What Else Goes Inside?

• Burger Sauce: A mix of ketchup, mayo, and a touch of chili sauce.

• Toppings: Sliced tomato, crisp lettuce, golden sautéed onions.

How to Make Swiss Mushroom Burgers

1. Brush mushrooms with garlic butter.

2. Drizzle with olive oil.

3. Roast until tender and juicy.

4. Top with cheese, return to oven to melt.

5. Stack into buns with all the fixings.

Craving Meat?

Feel free to bulk it up:

• Add a beef or chicken patty, or

• Try bacon and a fried egg.

Or, for a fully loaded vegetarian burger, layer in one of my signature veggie patties—believe it or not, even meat-lovers ask for those!

Get Ready for the Juiciest Burger

These burgers are gloriously messy: juicy mushrooms, melty cheese, and dripping sauce. You’ll need extra napkins, but it’s worth every bite.

There’s no elegant way to eat them—and that’s exactly how it should be. Dig in, make a mess, and enjoy every flavorful, mushroom-packed bite!

Ingredients

Mushrooms & Butter:

• 4+ large mushrooms (portobello or BBQ flat mushrooms), about 20% larger than your buns, or use multiple smaller mushrooms per burger (see Note 1)

• 30g (2 tbsp) unsalted butter

• 2 garlic cloves, finely minced

• ½ tsp salt

• ½ tsp black pepper

• ½ tbsp olive oil

• 4 slices Swiss cheese (or any meltable cheese of your choice)

Onions:

• 3 onions, cut into 0.7cm (1/3 inch) rings

• 1 tbsp olive oil

• ¼ tsp salt

• ¼ tsp black pepper

Pink Burger Sauce:

• ⅔ cup mayonnaise (or substitute sour cream + pinch of salt)

• 2 tbsp ketchup

• 1–3 tsp Sriracha (adjust to your preferred spice level)

Burger Assembly:

• 4 buns or rolls (brioche recommended)

• 8–12 lettuce leaves

• 2 tomatoes, sliced

On the Side:

• French fries or baked potato wedges (optional)

Instructions

1. Preheat Oven:
   Set oven to 220°C (450°F) or 200°C (fan).

2. Prepare Garlic Butter:
   Combine butter, garlic, salt, and pepper in a heatproof bowl. Microwave until butter melts, then stir well.

3. Prepare Mushrooms:
   Brush mushroom caps (smooth side) generously with garlic butter. Place them gill side up (stalk facing up) on a baking tray. Brush any remaining garlic butter over the rims and gills. Drizzle with olive oil.

4. Roast Mushrooms:
   Roast for 25 minutes. Flip mushrooms, brush with any collected juices, and roast for another 10 minutes or until tender.

5. Cook Onions:
   While mushrooms roast, heat olive oil in a large skillet over high heat. Cook onion rings for 5–7 minutes until golden and soft. Season with salt and pepper.

6. Add Cheese to Mushrooms:
   Place a slice of cheese on each mushroom and return to the oven for 3 minutes, just until the cheese melts.

7. Toast Buns:
   Toast buns in the oven during the last few minutes of mushroom roasting.

8. Make Pink Sauce:
   Mix mayonnaise, ketchup, and Sriracha together in a small bowl.

9. Assemble Burgers:
   Spread the bottom bun with a generous dollop of pink sauce. Layer with lettuce, tomato slices, roasted mushroom with melted cheese, and sautéed onions. Spread a little pink sauce on the top bun and place it on top. Serve immediately.

Notes:

1. Mushroom Sizes:
   Ideally, mushrooms should be about 15–20% larger than your buns because they shrink while cooking. If large mushrooms aren’t available, use 1.5 to 2 smaller mushrooms per burger and stack them.

   • If using small button or cremini mushrooms: Use about 200g (7 oz) per burger. Slice 0.5cm thick, sauté with 60g (4 tbsp) butter and 2 minced garlic cloves in batches until golden. Shape into a mound per burger, top with cheese, melt under a grill or lid, and add to buns.

2. Optional Burger Add-ons:

   • Avocado (mashed, can replace pink sauce)

   • Beetroot slices (a popular Aussie choice)

   • Sunny-side-up fried egg

   • Bacon

   • Pineapple (if you like it)

   • BBQ marinated vegetables

   • Extra sauces like ketchup, mayo, aioli, mustard, or chili sauces

Nutrition (Per Burger, including sauce)

• Calories: 566

• Carbohydrates: 36g

• Protein: 13g

• Fat: 43g (Saturated Fat: 14g)

• Cholesterol: 62mg

• Sodium: 963mg

• Potassium: 944mg

• Fiber: 5g

• Sugar: 16g

• Vitamin A: 4565 IU

• Vitamin C: 28mg

• Calcium: 171mg

• Iron: 1mg

Note: Nutrition is estimated assuming all butter and sauce are consumed, though some juices and butter may remain on the tray.