Creamy Reuben Soup with Corned Beef and Rye Croutons
Quick Answer
Creamy Reuben Soup turns the classic sandwich combination of corned beef, sauerkraut, Swiss cheese, and rye bread into a rich, spoonable comfort-food dinner. This version uses a simple roux and gentle heat for a smooth cheese broth, then adds homemade rye croutons just before serving so they stay crisp on top while soaking up a little of the creamy soup.
Creamy Reuben Soup is especially useful when you already have cooked corned beef and want something warmer and more substantial than another sandwich. The key is balance: the broth needs enough richness to carry the Swiss cheese without becoming heavy, while the sauerkraut adds the tang that keeps the soup from tasting flat.
The finished bowl is creamy rather than pasty, with visible pieces of corned beef and shredded sauerkraut throughout. Golden rye croutons give each serving the toasted flavor and crunch that make the Reuben connection immediately recognizable.
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The goal is practical guidance that helps home cooks understand the recipe, avoid common mistakes, and cook with confidence rather than adding unnecessary filler.
Why This Creamy Reuben Soup Works
The strongest part of this recipe is that every major ingredient has a clear job.
Corned beef supplies the savory meatiness you expect from a Reuben. Because it is already cooked, it goes into the soup near the end and only needs enough time to heat through.
Sauerkraut brings acidity and a slightly fermented tang. Draining it well matters because excess brine can thin the soup and push the salt level too high.
Swiss cheese provides the recognizable nutty, creamy cheese flavor. It is added over low heat in small amounts, which helps it melt smoothly instead of separating.
A flour-and-butter roux gives the soup body before the dairy and cheese are introduced. This creates a velvety broth without requiring potatoes or puréeing.
Rye croutons are more than a garnish. They provide the toasted bread flavor that connects the soup to a classic Reuben sandwich while adding a crisp texture against the creamy broth.
The method is also straightforward enough for a weeknight. Most of the cooking happens in one pot, and the croutons can toast while the soup is being prepared.
Recipe Summary
| Detail | Information |
|---|---|
| Prep Time | 15 minutes |
| Cook Time | 30 minutes |
| Total Time | 45 minutes |
| Servings | 6 |
| Course | Soup, Main Course |
| Cuisine | American |
| Difficulty | Easy |
| Estimated Calories | About 510 per serving |
Ingredients
For the Creamy Reuben Soup
- 2 tablespoons unsalted butter
- 1 medium yellow onion, finely diced
- 1 small carrot, finely diced
- 2 cloves garlic, minced
- 3 tablespoons all-purpose flour
- 4 cups low-sodium chicken broth
- 1 cup half-and-half
- 1 cup whole milk
- 2 cups sauerkraut, well drained and lightly squeezed
- 12 ounces cooked corned beef, cut or torn into small irregular pieces
- 1 teaspoon Dijon mustard
- 1/2 teaspoon caraway seeds, lightly crushed
- 1/4 teaspoon freshly ground black pepper
- 6 ounces Swiss cheese, freshly shredded
- 1/4 cup heavy cream
- Salt, only if needed
For the Rye Croutons
- 3 thick slices rye bread, cut into 3/4-inch cubes
- 1 tablespoon melted butter
- 1/4 teaspoon caraway seeds, optional
- Pinch of black pepper
Ingredient Notes
Corned beef: Cooked corned beef works best here. Cut or tear it into small pieces instead of mincing it finely so you still get visible, tender bites throughout the soup.
Sauerkraut: Drain it thoroughly before measuring. If yours is especially salty or sharp, you can briefly rinse it, but rinsing will also soften some of its characteristic tang.
Swiss cheese: Shred it from a block if possible. Freshly shredded cheese tends to melt more smoothly than many packaged shredded cheeses.
Low-sodium broth: This gives you more control over seasoning because corned beef, sauerkraut, and Swiss cheese all contribute salt.
Caraway seeds: They reinforce the rye-bread character of the soup. Use them lightly so they support the Reuben flavor rather than dominating it.
Equipment
You only need basic kitchen equipment:
- Chef’s knife
- Cutting board
- Sheet pan
- Large Dutch oven or heavy-bottomed soup pot
- Wooden spoon or silicone spatula
- Whisk
- Ladle
How to Make Creamy Reuben Soup
1. Toast the rye croutons
Heat the oven to 375°F.
Toss the rye bread cubes with melted butter, caraway seeds, and black pepper. Spread them in a single layer on a sheet pan.
Bake for 9 to 12 minutes, turning once, until the edges are deep golden and the centers feel dry and crisp.
Don’t pull them from the oven while they are still pale. A deeper toast gives the croutons enough structure to sit on hot soup without immediately collapsing.
2. Soften the onion and carrot
Melt the butter in a large soup pot over medium heat.
Add the diced onion and carrot and cook for 5 to 6 minutes, stirring occasionally.
The onion should become translucent and the carrot should begin to soften. Avoid hard browning because the goal is a pale, creamy finished soup rather than a deeply browned base.
3. Add the garlic
Stir in the minced garlic and cook for about 30 seconds.
Stop as soon as it becomes fragrant. Garlic that browns too much can introduce bitterness.
4. Make the roux
Sprinkle the flour evenly over the vegetables.
Stir continuously for about 1 minute. The mixture should look thick and slightly foamy, with no visible dry flour.
That short cooking period removes the raw flour taste while preserving the roux’s thickening power.
5. Whisk in the broth
Pour in the chicken broth gradually while whisking.
Adding the liquid slowly at first helps the flour disperse evenly instead of forming lumps.
Once all the broth is incorporated, the soup base should look smooth.
6. Let the broth thicken
Bring the mixture to a gentle simmer and cook for 5 to 7 minutes, stirring occasionally.
The broth should begin to lightly coat the back of a spoon. It shouldn’t look as thick as the final soup yet because the dairy and cheese still need to be added.
7. Add the dairy gently
Reduce the heat to medium-low.
Stir in the half-and-half and whole milk. Heat for 3 to 4 minutes, but don’t let the soup boil aggressively.
Gentle heat is important from this point forward because high heat can make dairy and cheese separate.
8. Add the Reuben ingredients
Stir in the drained sauerkraut, corned beef, Dijon mustard, crushed caraway seeds, and black pepper.
Let everything simmer gently for about 5 minutes.
The corned beef only needs reheating, so there is no benefit to aggressively boiling it.
9. Melt in the Swiss cheese
Turn the heat to low.
Add the shredded Swiss a handful at a time, stirring until each addition has melted before adding the next.
This is the most important texture step in the recipe. If the soup is bubbling hard when the cheese goes in, the cheese is more likely to become grainy or oily.
10. Finish with cream
Stir in the heavy cream and heat for another 1 to 2 minutes.
The soup should now be velvety and spoonable, with visible strands of sauerkraut and pieces of pink corned beef suspended throughout.
If it seems too thick, add a splash of broth or milk.
11. Taste before adding salt
Taste the finished soup before reaching for the salt shaker.
Corned beef, Swiss cheese, sauerkraut, and broth can contribute plenty of seasoning on their own. Add extra salt only if the finished soup genuinely needs it.
12. Add the croutons at serving time
Ladle the hot soup into bowls and top each portion with several rye croutons immediately before serving.
The bottoms will soften slightly where they touch the broth, while the exposed edges stay crisp.
Chef Tips
- Squeeze excess liquid from the sauerkraut. A wet sauerkraut can noticeably thin the soup.
- Don’t season with salt early. Wait until the corned beef and cheese are in the pot before deciding whether more is necessary.
- Use a heavy-bottomed pot. It distributes heat more evenly and reduces the chance of scorching the dairy.
- Keep the corned beef pieces irregular. Small strips and chunks give the soup a more satisfying texture than finely chopped meat.
- Grate the Swiss cheese before you start cooking. Once the dairy is hot, you want to add the cheese promptly without leaving the pot unattended.
- Lower the heat before adding cheese. This is the easiest way to preserve a smooth, creamy texture.
- Add cheese gradually. Dumping it all in at once makes smooth incorporation more difficult.
- Toast the rye darker than sandwich bread. A well-toasted crouton holds up much better against hot soup.
- Keep croutons separate until serving. Never mix them into the entire pot unless you intentionally want soft bread.
- Thin leftovers gradually. Creamy soups often become thicker after refrigeration; a small splash of milk or broth usually restores the original consistency.
Common Mistakes to Avoid
Adding too much salt
Corned beef, sauerkraut, broth, and Swiss cheese can all be salty. Seasoning heavily at the start can make the finished soup difficult to correct.
Fix: Add unsalted milk or low-sodium broth to dilute the salt if the soup becomes overly salty.
Boiling after adding the cheese
High heat can cause Swiss cheese to become grainy or release fat.
Avoid it: Reduce the heat to low before adding cheese and keep the soup below a boil.
Using very wet sauerkraut
Excess brine can thin the soup and increase both acidity and saltiness.
Avoid it: Drain and lightly squeeze the sauerkraut before adding it.
Adding all the Swiss at once
A large mass of cheese cools unevenly and can clump.
Avoid it: Stir it in a handful at a time.
Making the soup too thick
Flour, cheese, and refrigeration can all increase thickness.
Fix: Add broth or milk 1/4 cup at a time until the soup returns to a creamy, spoonable consistency.
Making the soup too thin
If the roux doesn’t simmer long enough after broth is added, it may not develop sufficient body.
Fix: Before adding the cheese, allow the base to gently simmer a little longer.
Adding the croutons too early
Rye cubes absorb liquid quickly.
Avoid it: Keep them in an airtight container and place them on each bowl at the table.
Variations
Extra-Corned-Beef Reuben Soup
Increase the cooked corned beef to 1 pound for a heartier bowl. The soup will feel more substantial and slightly saltier, so additional seasoning may not be necessary.
Lighter Reuben Soup
Replace the half-and-half with additional whole milk and omit the heavy cream.
The soup will be less rich and slightly thinner, but the Reuben flavor remains recognizable.
Gluten-Free Version
Use a reliable 1:1 gluten-free flour blend for the roux and replace the rye croutons with toasted gluten-free bread.
The texture can remain similar, but you’ll lose some of the traditional rye flavor.
Pastrami Reuben Soup
Pastrami can replace the corned beef in the same quantity.
Expect a more peppery, smoky result rather than an identical flavor.
No-Caraway Version
Simply omit the caraway seeds.
The soup will still contain the main Reuben flavors, though the rye-like aromatic note will be less pronounced.
Storage Instructions
Room Temperature
Don’t leave the soup at room temperature for more than 2 hours.
Refrigerator
Cool leftovers and transfer them to an airtight container.
Refrigerate for up to 3 to 4 days.
Keep the croutons in a separate container at room temperature so they don’t become soft.
Freezer
Cream-and-cheese soups can change texture after freezing and thawing, so freezing isn’t the preferred storage method.
If necessary, freeze the soup in an airtight container for up to 1 month. Thaw it in the refrigerator and reheat gently while stirring.
Best Container
Use a tightly sealed glass or food-safe plastic container with enough room to stir the soup after chilling.
How to Reheat Creamy Reuben Soup
The stovetop gives you the best control.
Place the soup in a saucepan over low to medium-low heat and stir frequently until heated through. Add a small splash of milk or chicken broth if the soup has thickened.
Avoid bringing it to a hard boil. Gentle reheating helps preserve the creamy texture of the Swiss cheese and dairy.
For one serving, you can also use the microwave. Heat at reduced power in short intervals, stirring between each interval.
Always add fresh croutons after reheating rather than storing or reheating them in the soup.
Make-Ahead Instructions
Creamy Reuben Soup can be partially prepared ahead.
The rye croutons can be toasted up to 3 days in advance and stored in an airtight container at room temperature.
You can also chop the onion, carrot, and corned beef and shred the Swiss cheese a day ahead. Refrigerate each component in a covered container.
For the best texture, prepare the soup itself close to serving time. If you make the full soup ahead, cool and refrigerate it, then reheat it gently and add a little broth or milk if necessary.
Serving Suggestions
This is already a filling soup, so simple sides work best.
Try it with:
- Extra toasted rye bread
- A crisp green salad with vinaigrette
- Dill pickles
- Apple slaw
- Roasted carrots
- Roasted Brussels sprouts
- Steamed green beans
For drinks, unsweetened iced tea, sparkling water with lemon, or a simple cold soda all work well with the rich, salty-tangy flavors.
If you want dessert afterward, choose something relatively simple, such as apple crisp, oatmeal cookies, or fresh fruit.
Easy Soup Recipes
Frequently Asked Questions
What is Reuben soup made of?
Reuben soup is inspired by a classic Reuben sandwich. This creamy version combines corned beef, sauerkraut, Swiss cheese, and rye croutons in a thickened broth made with milk, half-and-half, and a simple roux.
Can I use leftover corned beef?
Yes. Cooked leftover corned beef is ideal because the meat only needs to be warmed in the soup. Cut or tear it into small pieces before adding it.
Do I need to rinse the sauerkraut?
Not necessarily. Drain and squeeze it well first. If your sauerkraut tastes exceptionally salty or acidic, a quick rinse can soften those flavors, although it will also reduce some of the characteristic tang.
Why did my cheese soup become grainy?
The most common cause is excessive heat. Swiss cheese melts more smoothly when the soup is kept below a boil and the cheese is added gradually over low heat.
Can I use pastrami instead of corned beef?
Yes, but the flavor will change. Pastrami tends to be smokier and more peppery, while corned beef gives the soup the more traditional Reuben profile.
Can I freeze Creamy Reuben Soup?
You can, but the texture may not be as smooth after thawing because dairy-and-cheese soups can separate. Refrigeration is preferable when possible.
How do I make Reuben soup less salty?
Use low-sodium broth, drain the sauerkraut thoroughly, and don’t add extra salt until the corned beef and Swiss cheese have been incorporated and you’ve tasted the finished soup.
What bread is best for the croutons?
Rye bread is the natural choice because its flavor is part of the classic Reuben combination. Toast it until deeply golden so the croutons stay crisp longer.
Can I make this soup without heavy cream?
Yes. Replace the heavy cream with additional whole milk or half-and-half. The soup will be slightly lighter and less rich.
Key Takeaways
- Keep the soup below a boil after adding dairy and Swiss cheese for the smoothest texture.
- Drain the sauerkraut thoroughly so it doesn’t make the broth watery or excessively salty.
- Add cooked corned beef near the end because it only needs to heat through.
- Toast rye croutons until deeply golden and add them immediately before serving.
- Refrigerated leftovers will thicken, so gently reheat them with a splash of broth or milk.
Quick Recipe Summary
Creamy Reuben Soup combines cooked corned beef, drained sauerkraut, Swiss cheese, and classic rye flavor in a smooth, rich soup. A butter-and-flour roux thickens chicken broth before milk, half-and-half, and the Reuben ingredients are added. The Swiss cheese is stirred in gradually over low heat to help maintain a creamy texture. Homemade rye croutons are toasted separately and added just before serving for crisp contrast. The recipe takes about 45 minutes and serves six. Store leftover soup separately from the croutons and reheat it gently without boiling.
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Useful Links
- USDA Safe Minimum Internal Temperatures
- USDA Leftovers and Food Storage
- FDA Food Safety During Preparation
- Cooperative Extension Guide to Baking Potatoes
- MyPlate Vegetable Serving Guidance
