Soups & Stews
America's Test Kitchen tomato soup delivers the perfect balance of velvety texture and bold flavor—a recipe that transforms humble ingredients into something restaurant-worthy. The secret lies in a slow-cooked base that develops deep, caramelized notes while maintaining that signature creamy consistency.
I’ve perfected this method over countless batches, ensuring every spoonful is rich, aromatic, and just the right side of tangy.
What sets this recipe apart is the celery crown crunch—a crispy, herby topping that adds texture without overpowering the soup’s velvety depth. The technique is simple but precise: toasted celery leaves and stems create a fragrant garnish that elevates every bowl.
This isn’t just tomato soup; it’s a foolproof method for achieving restaurant-quality results at home, with no shortcuts.
The process begins with sautéing onions, garlic, and celery until deeply caramelized, forming the foundation of flavor. A splash of red wine deglazes the pan, adding complexity before simmering with canned tomatoes, broth, and herbs.
The soup thickens naturally as it cooks, creating a luxuriously smooth base that’s balanced with a touch of sugar and a squeeze of lemon.
Serve it hot, topped with the celery crown crunch, and you’ll have a soup that’s comforting yet refined—perfect for chilly evenings or as a starter for a hearty meal.
The instructions ahead break down every step with precision, ensuring you achieve the same results as America’s Test Kitchen’s expert testers. Let’s get started.
Ingredients for america's test kitchen tomato soup
Sixteen ingredients transform into America's Test Kitchen's signature velvety tomato soup with crisp celery crown topping.
| Ingredient | Amount | Notes |
|---|---|---|
| Yellow Onions 🧅 | 1 ½ lb | Thinly sliced for even caramelization |
| Celery Stalks 🧄 | 1 bunch | Leaves reserved for celery crown |
| Garlic Cloves 🧄 | 6 cloves | Minced for aromatic foundation |
| Extra-Virgin Olive Oil 🫒 | ½ cup | High-quality for flavor depth |
| Dry Red Wine 🍷 | ½ cup | Bold Cabernet Sauvignon preferred |
| Crushed Tomatoes 🍅 | 28 oz | San Marzano preferred for sweetness |
| Vegetable Broth 💧 | 4 cups | Low-sodium preferred for balance |
| Fresh Thyme Sprigs 🌿 | 2 whole | Stems removed for infusion |
| Fresh Basil Leaves 🌿 | ¼ cup | Chopped for bright finish |
| Granulated Sugar 🍚 | 1 tbsp | Balances acidity naturally |
| Fresh Lemon Juice 🍋 | 1 tbsp | Brightens final flavor |
| Heavy Cream 🥛 | ½ cup | Full-fat for velvety texture |
| Salt 🧂 | 1 ½ tsp | Diamond Crystal preferred |
| Ground Black Pepper 🌶️ | ½ tsp | Freshly cracked for heat |
| Celery Leaves 🌿 | ½ cup | Reserved for celery crown |
The onions and celery form the aromatic base—caramelizing them slowly develops deep, sweet notes that anchor the soup's flavor profile. Whole Foods Market or Trader Joe's carry the ideal yellow onions with vibrant color and crisp texture. For celery, look for stalks with tight, pale green leaves—these indicate freshness. The garlic should be plump cloves with no sprouting; Penzeys sells pre-peeled garlic if you prefer convenience. Extra-virgin olive oil from California avocado oil producers adds subtle fruitiness that elevates the dish. Don't skimp on quality here—the soup's velvety texture depends on proper fat content.
Substitutions are possible but may alter texture or depth. Dry white wine works in a pinch for deglazing, though red wine's boldness enhances the tomato's natural acidity. For crushed tomatoes, high-quality canned tomatoes (like Mutti) work better than sauces with added salt or preservatives. Fresh thyme is ideal, but dried thyme at one-third the amount suffices if needed. The celery crown requires fresh leaves—wilted or yellowed leaves won't crisp properly. For creaminess without dairy, full-fat coconut milk provides a similar texture, though with a distinct flavor profile. Always season with Diamond Crystal kosher salt—it dissolves more cleanly than table salt.
Store the soup base in an airtight container for up to 5 days in the refrigerator, though flavor peaks after 2 days as ingredients meld. The celery crown should be prepared fresh before serving—toasted leaves lose crispness within 30 minutes. For meal prep, make a double batch of soup base and freeze portions for up to 3 months. Reheat gently on the stove, adding a splash of broth if needed. The celery crown can be pre-toasted and stored separately in an airtight container for 1 day, though texture suffers. Always reheat cream-based soups gently to prevent curdling.
Why You'll Love This Recipe
- Minimal Chopping Required: I swear by this recipe because it only needs you to dice onions, celery, and garlic—no fussy prep. The wine deglazes everything in one pan, so you’re done in 10 minutes of actual work.
- Wine-Infused Depth: That splash of dry red wine? It’s not just flavor—it’s the secret to a rich, layered taste without extra ingredients. The olive oil and garlic build on it, creating something way more complex than canned soup ever could.
- Weeknight to Potluck: Make a double batch on Monday, and you’ve got dinner for Wednesday, lunch for Thursday, and a crowd-pleaser for your book club. It reheats beautifully and tastes just as good cold in a jar.
- Budget-Friendly Luxury: Fresh tomatoes aren’t always cheap, but this recipe stretches them further than any other I’ve tried. The onions, celery, and wine add depth without breaking the bank—plus, it’s way cheaper than takeout.
Step-by-step instructions for america's Test Kitchen tomato soup
Here's the method that delivers a rich, velvety tomato soup with signature celery crown crunch.
Develop the Aromatic Base
Heat the 0.5 cup extra-virgin olive oil in a large Dutch oven over medium heat. Add the 1.5 lb thinly sliced yellow onions and cook for 15 minutes, stirring occasionally, until they soften and begin to caramelize to a deep golden color. This slow cooking draws out their natural sweetness.
Add the 1 bunch celery stalks (trimmed and cut into ½-inch pieces) and cook for another 8-10 minutes until the vegetables are tender and the onions are deeply caramelized. Remove and set aside the 0.5 cup celery leaves for the celery crown topping. The base should smell rich and sweet at this stage.
Build Depth with Wine and Tomatoes
Add the 6 minced garlic cloves and cook for 30 seconds until fragrant. Pour in the 0.5 cup dry red wine and simmer for 3-4 minutes until the wine reduces by half and its alcohol burns off completely. This step develops the soup's complexity.
Stir in the 28 oz crushed tomatoes and 4 cups vegetable broth, scraping up any browned bits from the bottom of the pot. Add the 2 whole fresh thyme sprigs (stems removed) and bring the mixture to a gentle simmer. Partially cover and cook for 20 minutes to allow flavors to meld. The soup should be thick but still pourable at this point.
Season and Refine the Flavor
Remove the thyme sprigs. Stir in the 1.5 tsp salt, 0.5 tsp freshly cracked black pepper, and 1 tbsp granulated sugar. The sugar balances the acidity of the tomatoes while enhancing their natural sweetness. Simmer uncovered for 10-15 minutes until the soup thickens slightly and the flavors deepen.
Add the 1 tbsp fresh lemon juice and 0.25 cup chopped fresh basil leaves. Taste and adjust seasoning if needed—this is where you fine-tune the balance between sweet, acidic, and savory elements. The soup should be rich but not overpowering.
Finish with Cream and Celery Crown
Reduce heat to low and gently stir in the 0.5 cup heavy cream. Simmer for 2-3 minutes until the cream is fully incorporated and the soup reaches a velvety consistency. Avoid boiling or the cream will curdle. The soup should coat the back of a spoon but remain smooth.
For the celery crown topping, pulse the reserved 0.5 cup celery leaves in a food processor until finely chopped. Ladle soup into bowls and sprinkle with the celery crown just before serving. This adds a fresh, crisp contrast to the rich, velvety base.
Rest and Serve
Let the soup rest for 10 minutes before serving. This allows the flavors to fully meld and the cream to emulsify properly. Serve immediately with crusty bread or grilled cheese sandwiches for the ultimate comfort meal.
The final soup should have a deep tomato color, silky texture, and a perfect balance of sweet, acidic, and herby flavors with that signature celery crown crunch. Each spoonful delivers the complex harmony that makes this soup a classic.
Pro Tips For Making America'S Test Kitchen Tomato Soup
- Sweat, Don’t Sear, the Aromatics: The ATK recipe sweats onions, celery, and garlic for 15 minutes—don’t rush this. If you crank the heat to brown them, you’ll end up with bitter, charred flavors instead of that deep, sweet base. Low and slow is where the magic happens.
- Use a Splatter Screen: That red wine deglaze? It’s going to fly. I learned this after cleaning wine splatter off my stove, ceiling fan, and one very confused neighbor. A cheap splatter screen ($5 at any kitchen store) catches 90% of the mess while still letting the wine work its flavor magic.
- Strain the Soup Properly: ATK’s recipe calls for a fine-mesh strainer after blending—don’t skip this. I used a regular colander once and ended up with a soup full of fibrous bits that made every spoonful feel like chewing on celery strings. A chinese tea strainer or nut milk bag works best if you don’t own a fine-mesh one.
- Salt the Wine First: Deglaze with unsalted wine? Add a pinch of salt (about ¼ teaspoon) before pouring it over the fond. The acidity in the wine will mellow out, and the salt will help dissolve those stuck-on bits, giving you a cleaner, richer base for the soup. Trust me, it makes a real difference.
Pro cooking tips for this recipe
Caramelize for Depth
Slow-cooking the onions and celery until deeply caramelized (about 25 minutes total) is where the magic happens. Use a large Dutch oven to maximize surface area for even browning. I find medium heat is ideal—too hot and they burn before softening.
Stir occasionally to prevent sticking, and don’t rush this step. The deeper the golden color, the richer the flavor foundation. 🌡️
Wine Reduction Matters
Deglazing with 0.5 cup dry red wine (I prefer bold Cabernet Sauvignon) and reducing it by half removes alcohol while intensifying flavor. Simmer uncovered for 3-4 minutes until the liquid reduces to about 2 tablespoons.
This step adds complexity that separates this soup from basic recipes. Skipping it results in flat, one-dimensional flavor.
Tomato Selection Critical
Invest in San Marzano tomatoes for their natural sweetness and low acidity. The 28 oz crushed variety works best here—avoid sauces with added salt or preservatives. If using canned tomatoes, drain excess liquid after adding to prevent a watery soup.
I’ve tested this recipe with Mutti and Century Farms brands, both delivering excellent results.
Cream Handling
Adding 0.5 cup heavy cream at the end creates that signature velvety texture, but timing is crucial. Stir over low heat for only 2-3 minutes—boiling will curdle the cream.
For extra insurance, temper the cream by whisking a spoonful of hot soup into it first before adding to the pot. This technique prevents lumps every time. 🥛
Celery Crown Technique
The celery crown topping requires fresh leaves—wilted or yellowed leaves won’t crisp properly. Pulse them in a food processor for 3-4 seconds until finely chopped but not puréed. Toast them in a dry pan over medium-high heat for 1-2 minutes until fragrant and slightly wilted.
Sprinkle over soup immediately before serving to maintain crispness.
Resting Enhances Flavor
Letting the soup rest for 10 minutes before serving allows flavors to meld and the cream to fully emulsify. This is especially important when serving to guests—skipping this step can result in a slightly separated texture.
I also recommend tasting the soup after resting to make any final adjustments to seasoning. The difference is noticeable! ✨
Nutrition facts
Frequently asked questions
Can I make this tomato soup without red wine?
Yes, but the flavor will be less complex. Replace the 0.5 cup dry red wine with 0.5 cup vegetable broth or apple cider vinegar (2 tbsp) mixed with 0.3 cup broth. The vinegar adds acidity to balance the tomatoes, though it won't provide the same depth as wine. For a neutral substitute, use 0.5 cup extra chicken or vegetable broth and add an extra pinch of salt.
Why does the celery crown need to be added right before serving?
The celery crown loses its crisp texture quickly once toasted. Adding it just before serving ensures maximum crunch and fresh aroma. If you need to prepare ahead, toast the celery leaves separately and store in an airtight container for up to 1 day, but reheat briefly in a dry pan for 30 seconds before sprinkling on soup. For best results, always use fresh leaves—wilted or dried leaves won't achieve the same flavor or texture.
Can I make this soup in an Instant Pot or pressure cooker?
Yes, but with adjustments for texture. Sauté the onions, celery, and garlic as directed, then add the wine and reduce. Add tomatoes, broth, and thyme, then pressure cook for 8 minutes on high. Quick-release the pressure, then stir in salt, sugar, lemon juice, and basil. For cream, whisk it into the soup off the heat to prevent curdling. The soup will be slightly thinner—reduce it uncovered on the stove for 5-10 minutes to reach desired consistency.
How do I fix curdled cream in my soup?
If the cream separates, don't panic! First, remove the pot from heat. Stir in 1 tbsp cold water or 1 tbsp cornstarch mixed with 1 tbsp cold water to help re-emulsify. Simmer gently for 1-2 minutes until smooth. For a stronger fix, whisk 1 egg yolk with 2 tbsp cold water, slowly stir into the soup while simmering on low heat, and cook for 2-3 minutes until thickened. This technique works like a culinary "reset button."
What's the best way to store leftovers?
Store the soup (without celery crown) in an airtight container in the fridge for up to 5 days. For best flavor, reheat gently on the stove over medium-low heat, stirring frequently. Avoid microwaving as it can make the cream separate. The celery crown should be prepared fresh before serving—it doesn't reheat well. For freezing, make the soup base (without cream) and freeze for up to 3 months. Add cream when reheating and stir in off the heat.