The Best Reuben Stuffed Mushrooms You’ll Ever Make

Servings: 16-18 stuffed mushrooms  |  Prep Time: 15 minutes  |  Cook Time: 30 minutes  |  Total Time: 45 minutes

You love a classic Reuben sandwich, right? Now imagine all that bold, tangy, cheesy goodness packed into a juicy mushroom cap. That’s exactly what Reuben Stuffed Mushrooms deliver — and honestly, they’re dangerously addictive.

I made these for a game night last fall, and they disappeared before I even grabbed one for myself. True story. These little bites combine corned beef, sauerkraut, cream cheese, and Swiss — all tucked inside a perfectly roasted mushroom cap.

Whether you’re hosting a party, looking for a creative appetizer, or just craving something different, this recipe checks every box. Let’s get into it.

What Are Reuben Stuffed Mushrooms?

Think of a Reuben sandwich — that deli classic loaded with corned beef, Swiss cheese, sauerkraut, and Thousand Island dressing on rye bread. Now, take all those flavors and stuff them into a mushroom cap instead. The result? Pure magic.

Reuben Stuffed Mushrooms are a low-carb, bite-sized twist on the sandwich. They work brilliantly as appetizers, party snacks, or even a light dinner. You get all the savory, tangy punch without the bread — IMO, that’s not a loss at all.

The mushroom acts as a natural cup, holding the filling perfectly. Cremini or baby bella mushrooms work best because they have just the right size and meaty texture to stand up to all that bold stuffing.

Ingredients You’ll Need

For the Mushrooms:

• 16-18 oz cremini (baby bella) mushrooms or small portobello
• 2 tbsp avocado or olive oil
• Coarse sea or kosher salt, to taste
• Black pepper, to taste

For the Reuben Filling:

• 6 oz cream cheese, softened
• 8 oz corned beef, diced small
• 1/3 cup sauerkraut, squeezed dry
• 3/4 cup shredded Swiss cheese
• 3 tbsp Thousand Island dressing
• Coarse sea or kosher salt, to taste
• Black pepper, to taste

Now For the Topping:

• 1/4 cup shredded Swiss cheese

How to Make Reuben Stuffed Mushrooms: Step-by-Step

Here’s where the fun begins. This recipe is simple enough for a weeknight but impressive enough to serve at any gathering. Have you ever noticed how the best recipes are always the ones that look harder than they actually are?

Step 1: Preheat and Prep Your Baking Dish

Start by preheating your oven to 350 degrees F. While that heats up, lightly grease a 9×13 baking dish. You want just enough grease to keep the mushrooms from sticking — a quick spritz of cooking spray or a thin wipe of oil does the job perfectly.

Getting your dish ready first means you won’t be scrambling later when your hands are covered in filling. Trust me on this one. A little prep goes a long way toward a smooth, stress-free cooking session.

Step 2: Clean and Prepare the Mushroom Caps

Rinse your 16-18 oz of cremini mushrooms quickly under cold running water. Don’t soak them — mushrooms absorb water like tiny sponges, and soggy mushrooms make for soggy stuffed mushrooms. A fast rinse and a thorough pat dry is all you need.

Next, carefully pop the stems off each mushroom. You can use your fingers or a small knife — just twist gently and they come right out. FYI, don’t throw those stems away! Saute them with butter and garlic as a side dish or toss them into scrambled eggs the next morning.

Now here’s a tip that makes a real difference: scrape out the brown gills inside each mushroom cap. Use a small spoon and gently run it around the inside of each cap, scooping out that dark membrane. This creates significantly more room for stuffing — and more filling is always the goal.

Once all caps are cleaned and de-gilled, toss them in 2 tablespoons of oil and season with salt and black pepper. Make sure every cap gets a good coating of oil — this helps them roast evenly and develop that beautiful golden color. Arrange them in your prepared baking dish, open side up, ready to be filled.

Step 3: Make the Reuben Filling

This is where all the Reuben magic happens. Grab a medium mixing bowl and add your 6 oz of softened cream cheese first. Make sure it’s truly softened — cold cream cheese won’t blend well and you’ll end up with lumpy filling, which is nobody’s idea of a good time.

Add 8 oz of finely diced corned beef to the bowl. Dice it small — you want pieces that fit neatly into each mushroom cap without overflowing everywhere. Larger chunks make it harder to get a clean, generous dome of filling on each mushroom.

Here’s a crucial step that many people skip: squeeze your sauerkraut really well before adding it. Take your 1/3 cup of sauerkraut and squeeze out as much liquid as possible using your hands or a clean kitchen towel. Wet sauerkraut makes the filling watery and can make your mushrooms soggy. You want that tangy flavor without all the extra moisture.

Now add 3/4 cup of shredded Swiss cheese and 3 tablespoons of Thousand Island dressing. Season with salt and black pepper to taste. Use a spatula to mix everything together firmly, folding and pressing until all ingredients are evenly combined. The mixture should look cohesive — no streaks of cream cheese, no clumps of corned beef on their own.

Taste the filling before stuffing. Does it need a little more pepper? A touch more Thousand Island for that tangy kick? Adjust it now. You’re the chef here, and the filling sets the tone for the entire dish.

Step 4: Fill the Mushroom Caps

Now comes the satisfying part. Take a spoonful of your Reuben filling and press it generously into each mushroom cap. You want a nice dome of filling sitting on top — proud and loaded, but not so tall that it topples over. Think of it like a well-packed scoop of ice cream. 🙂

Be consistent with how much filling you add to each cap. If some mushrooms are smaller, use a bit less filling so the ratio stays balanced. Every bite should deliver the same great flavor experience — that’s what separates a good appetizer from a great one.

Once all caps are filled, sprinkle 1/4 cup of shredded Swiss cheese generously over the tops. This creates that gorgeous golden, bubbly cheese crust during baking. Don’t skimp on this step — the extra cheese on top is what gives Reuben Stuffed Mushrooms that irresistible finishing touch.

Step 5: Bake to Golden Perfection

Place your baking dish in the preheated oven and bake for about 30 minutes. You’re looking for a few visual cues: the mushrooms should be tender and slightly shrunken, the filling should be hot and bubbling at the edges, and the Swiss cheese on top should be melted to a beautiful golden brown.

Resist the urge to pull them out early just because they smell incredible — and they will smell incredible. Letting them go the full 30 minutes ensures the mushrooms are fully cooked through and the filling is piping hot all the way to the center.

Once out of the oven, let the mushrooms rest in the dish for at least 3-5 minutes before transferring to a serving platter. This resting time lets everything settle and firm up slightly, making them much easier to transfer and eat without falling apart.

Pro Tips for the Best Reuben Stuffed Mushrooms

Want to take these from good to absolutely unforgettable? Here are a few hard-earned tips from making this recipe more times than I can count.

• Squeeze the sauerkraut hard. Seriously, really hard. This is the single most important tip. Wet sauerkraut ruins the texture of the filling and makes the mushrooms release too much liquid while baking.
• Soften the cream cheese completely. Leave it on the counter for at least 30 minutes before mixing. It blends into a smooth, cohesive filling that holds together beautifully.
• Don’t skip the gills. Removing them might feel fussy, but it genuinely creates more room for filling. More filling = better mushrooms. Simple math.
• Dice the corned beef small. Bite-sized pieces of corned beef mean every bite gets an even mix of all the flavors. Large chunks throw off the balance.
• Rest before serving. Those few minutes of rest aren’t optional — they make transferring the mushrooms much cleaner and the filling sets up just enough to hold its shape.

Why This Recipe Works So Well

Have you ever wondered why some recipes just click immediately? Reuben Stuffed Mushrooms work because every component plays a role. The cream cheese binds the filling and adds richness. The corned beef brings that hearty, salty depth. The sauerkraut cuts through the richness with tang.

The Thousand Island dressing ties everything together — it’s the same reason it makes a Reuben sandwich so iconic. And the Swiss cheese on top adds that melted, savory crown that makes every bite feel indulgent without being heavy.

The mushroom itself is a genius base. It’s sturdy enough to hold the filling, mild enough not to compete with the bold Reuben flavors, and earthy enough to complement the corned beef. It’s honestly the perfect vehicle. Much better than bread, dare I say it

Serving Suggestions and Pairings

These stuffed mushrooms shine on their own, but a few smart pairings can elevate the whole spread. Serve them alongside a simple green salad dressed in a light vinaigrette to balance the richness. A cold dill pickle on the side echoes the Reuben flavors beautifully.

For drinks, a cold lager or a pale ale pairs wonderfully. If you’re keeping it non-alcoholic, sparkling water with a wedge of lemon is refreshing alongside the bold, savory flavors. These also work as a starter before a hearty soup or a roasted chicken main.

Storage and Reheating

Got leftovers? Lucky you. Store any remaining stuffed mushrooms in an airtight container in the refrigerator for up to 3 days. They reheat really well and honestly taste just as good the next day after the flavors have had time to meld together overnight.

To reheat, place them in a 325 degree F oven for about 10-12 minutes until warmed through. Avoid the microwave if you can — it tends to make the mushrooms rubbery and the filling gummy. The oven keeps everything at the right texture and consistency.

You can also prep the filling a day ahead and store it covered in the fridge. When you’re ready to cook, just fill the fresh mushroom caps and bake as directed. This makes hosting much easier — you can get the prep done the night before.

FAQs About Reuben Stuffed Mushrooms

Can I make Reuben Stuffed Mushrooms ahead of time?

Yes, absolutely. You can prepare the filling up to 24 hours in advance and store it covered in the fridge. Clean and prep your mushroom caps and store them separately. When ready to serve, fill the caps and bake fresh. This makes party prep much more manageable.

What mushrooms work best for this recipe?

Cremini mushrooms (also called baby bella mushrooms) work best because of their sturdy texture and meaty flavor. Small portobello mushrooms also work well. Avoid button mushrooms — they’re too small and don’t have enough depth to hold a generous amount of filling.

Can I substitute the corned beef in this recipe?

Yes! Pastrami makes an excellent substitute and gives a slightly smokier, spicier flavor profile. Leftover pot roast or even roast beef also works if you want to use what you already have on hand. The spirit of the Reuben flavor stays intact with any of these swaps.

Why is my filling watery after baking?

This almost always comes down to the sauerkraut. If you don’t squeeze enough moisture out of it before adding it to the filling, it releases liquid during baking and makes the mixture watery. Squeeze the sauerkraut in a clean towel or with your fists until it’s as dry as possible — problem solved.

Can these be made gluten-free?

Great news: this recipe is naturally gluten-free as written. Just double-check that your Thousand Island dressing and corned beef are labeled gluten-free, as some brands add additives or thickeners that contain gluten. Everything else in the ingredient list is naturally free of gluten.

Final Thoughts on Reuben Stuffed Mushrooms

Reuben Stuffed Mushrooms bring together everything you love about the classic deli sandwich in a fun, bite-sized format. They’re easy to make, packed with bold flavor, and always get devoured at any gathering. Honestly, it’s one of those recipes you make once and then make forever.

The key moves to remember: squeeze that sauerkraut dry, soften your cream cheese, scrape out the gills for more filling room, and let the mushrooms rest a few minutes after baking. Those four things alone will give you perfect results every single time.

So the next time you need an appetizer that genuinely impresses — or you just want to eat something ridiculously good on a Tuesday night — make these. Your future self will absolutely thank you.