Roasted Tomato Basil Soup: Deep Flavor by Roasting
Infuse classic tomato soup with rich, roasted flavors and aromatic basil using simple ingredients and easy techniques.
Roasted Tomato Basil Soup
This Roasted Tomato Basil Soup transforms the simple concept of tomato soup into a deeply flavorful, comforting dish. By roasting ripe plum tomatoes and carefully blending them with onions, garlic, plenty of basil, and a touch of spice, you arrive at a soup that is rich without cream, bright with herbs, and perfect for any time of year. This recipe pays homage to the wisdom of Ina Garten, whose approach allows even novice cooks to serve up profound flavor in every bowl.
Why Roast Your Tomatoes?
Roasting tomatoes is the signature step that elevates this soup from ordinary to outstanding. High oven heat caramelizes the natural sugars in the tomatoes, concentrating flavor and adding a subtle, smoky undertone. This step enhances the natural brightness and body of the soup without requiring added sugar, cream, or artificial thickeners. The result is a soup that’s both robust and nuanced.
Ingredients You’ll Need
- 3 lbs ripe plum tomatoes, halved lengthwise
- ¼ cup plus 2 tablespoons olive oil (for roasting and sautéing)
- 1 tablespoon kosher salt (adjust to taste)
- 1½ teaspoons freshly ground black pepper
- 2 cups yellow onions, chopped (about 2 medium onions)
- 6 garlic cloves, minced
- 2 tablespoons unsalted butter
- ¼ teaspoon crushed red pepper flakes (for subtle heat)
- 1 (28 oz) can plum tomatoes with juice (whole or diced)
- 4 cups fresh basil leaves, packed tightly
- 1 teaspoon fresh thyme leaves (or ½ teaspoon dried)
- 1 quart (4 cups) chicken stock (vegetarian stock or water can be substituted)
Preparation: Step-by-Step Guide
- Preheat your oven to 400°F (200°C). Prepare a large rimmed baking sheet by lining it with parchment paper for easy cleanup.
- Roast the Tomatoes: Arrange the halved plum tomatoes, cut side up, on the baking sheet. Drizzle with ¼ cup of olive oil, sprinkle evenly with 1 tablespoon kosher salt and 1 teaspoon black pepper. Toss gently to coat and spread in a single layer. Roast in the oven for 45 minutes, or until softened and slightly caramelized at the edges.
- Begin the Soup Base: While the tomatoes roast, heat 2 tablespoons olive oil and 2 tablespoons butter in a large stockpot (at least 8 quarts) over medium heat. Add the chopped yellow onions and minced garlic along with ¼ teaspoon crushed red pepper flakes. Sauté gently, stirring often, until the onions are translucent and begin to brown (about 10 minutes).
- Combine Ingredients: Add the canned plum tomatoes (with juices), the roasted tomatoes (including any pan juices), 4 cups of fresh basil, 1 teaspoon thyme, and 1 quart of chicken stock. Be sure to scrape any caramelized bits from the roasting pan into the soup—they add flavor!
- Simmer the Soup: Increase the heat. Bring the whole mixture to a boil, then immediately reduce to a simmer. Leave uncovered and simmer gently for 40 minutes, stirring occasionally.
- Blend for Smoothness: Allow the soup to cool slightly. Blend in batches using a standard blender, immersion blender, or food processor until smooth (or leave it a little chunky if you prefer texture). For extra-silky soup, pass it through a food mill fitted with the coarsest blade.
- Taste and Adjust: Taste for seasoning — add more salt or pepper as preferred. The basil should be vibrant and forward, the tomatoes deeply sweet and tangy.
- Serve: Ladle hot into bowls. Garnish with fresh basil, a drizzle of good olive oil, or a light scattering of grated Parmesan if desired.
Cook’s Tips and Substitutions
- • Vegetarian / Vegan Option: Use vegetable stock or water instead of chicken stock. For vegan adaptation, omit the butter and pick a plant-based alternative or increase the olive oil.
- • Batch Cooking: This soup stores well in the fridge (up to 5 days) and freezes beautifully for several months. Cool completely before transferring to airtight containers for freezing.
- • Food Mill vs. Blender: Traditionalists can use a food mill for a rustic texture and removal of seeds/skin. For a perfectly smooth consistency, use an immersion or high-speed blender instead.
- • Choosing Tomatoes: Fresh, ripe plum or Roma tomatoes work best for roasting. In off-seasons, good-quality canned tomatoes can be substituted for part or all of the fresh tomatoes.
- • Basil Quantity: Using a full 4 cups of fresh basil may seem bold, but it delivers the signature herby punch of the dish. Don’t skimp!
Serving Suggestions: The Classic Pairing
This roasted tomato basil soup is iconic when paired with grilled cheese. Consider these options to round out your meal:
- Grilled Cheese Sandwich: Use rustic artisan bread or classic sliced bread, with melting cheeses such as Havarti, sharp cheddar, or Gruyère. For extra flair, mix cheeses or add a layer of pesto inside.
- Crispy Croutons: Top the soup with homemade or store-bought croutons for crunch and contrast.
- Parmesan Crisps: Bake shaved Parmesan rounds until crispy, and float atop each serving for an elegant crunch.
- Chopped Fresh Herbs: Sprinkle bowls with additional basil, fresh chives, or parsley for color and freshness.
How This Soup Stands Out
- No Cream Needed: This soup delivers exceptional creaminess from the vegetables and basil alone.
- Bold Basil Flavor: Using four whole cups of fresh basil ensures the herb stands out amid the rich tomato base.
- Versatile Method: Feel free to swap stocks, adjust spicing, or add a finishing drizzle of cream or olive oil. It’s forgiving and endlessly adaptable.
Nutritional Highlights
| Nutrient | Per Serving (Approx.) | % Daily Value* |
|---|---|---|
| Calories | 170 | 9% |
| Fat | 11g | 17% |
| Carbohydrates | 15g | 5% |
| Protein | 3g | 6% |
| Fiber | 4g | 14% |
| Sodium | 750mg | 31% |
*Percent Daily Values are based on a 2,000 calorie diet. Your values may be higher or lower depending on your needs and adjustments.
Tips for Perfect Results
- Roast tomatoes until edges are slightly browned for maximum sweetness and flavor.
- Sauté onions gently; avoid burning the garlic to keep flavors mellow and balanced.
- Taste and season multiple times: the acidity and sweetness of tomatoes can fluctuate with ripeness.
- Use a high-powered blender for ultra-smooth texture, or leave slightly chunky for a rustic feel.
- For richness, stir in a splash of cream just before serving, or garnish with a dollop of crème fraîche. Not traditional, but excellent.
Frequently Asked Questions (FAQs)
Q: Can this soup be made ahead?
Absolutely. In fact, the flavor deepens after a day in the fridge. Store covered for up to five days or freeze for several months. Let thaw and reheat gently over low heat.
Q: Is there a vegan version?
Yes. Substitute vegetable stock for chicken stock, and omit the butter (replace with additional olive oil or vegan butter substitute). The soup remains hearty and full-flavored.
Q: My tomatoes are out of season. Can I use canned tomatoes?
Canned tomatoes can supplement or replace the fresh ones when tomatoes are out of peak season. Opt for high-quality, whole canned tomatoes, and consider roasting them in the oven briefly to deepen their flavor before using.
Q: What if I don’t have a food mill?
No problem. You can use a standard blender, immersion blender, or food processor to blend the soup to your desired texture. If you want to remove skins or seeds, strain through a fine-mesh sieve after blending.
Q: What other proteins can I add for a heartier soup?
While traditional tomato basil soup is vegetarian, you can add cooked white beans, shredded rotisserie chicken, or even cooked lentils for extra protein.
Creative Twists and Add-Ins
- Swirl in a little pesto just before serving for intensified basil aroma.
- Add a teaspoon of smoked paprika for a subtle smoky quality beyond the roasted tomatoes.
- For a slight sweetness, add a pinch of sugar or a diced carrot while simmering the soup base.
- Blend in roasted red peppers with the tomatoes for a Mediterranean flair.
Expert Advice: Mastering Ina Garten’s Approach
Ina Garten’s recipes are beloved because they combine straightforward technique with a focus on quality ingredients. Here are a few of her guiding principles for success with this soup:
- Use the freshest ingredients you can — this dish is all about coaxing the best from simple produce.
- Don’t be afraid of basil. Four cups is a lot, but it never overpowers — it brightens and infuses every bite.
- Finish with tasting and adjusting for the best possible result.
Summary Table: Ingredient Substitutions
| Ingredient | Standard Option | Possible Substitute | Notes |
|---|---|---|---|
| Chicken Stock | Chicken stock | Vegetable stock, water | For vegetarians/vegans |
| Unsalted Butter | Butter | Olive oil, vegan butter | Replace to make soup vegan |
| Plum Tomatoes | Fresh Roma/plum | Canned plum tomatoes | Especially in off-season |
| Fresh Thyme | Fresh thyme leaves | Dried thyme (½ tsp) | Use a smaller amount if dried |
Conclusion: A Soup That Sings of Summer—Year Round
This roasted tomato basil soup is both comfort and celebration—a way to transform supermarket tomatoes or backyard bounty into something unforgettable. With a few pantry staples, lots of basil, and a willingness to experiment, you can master this classic and return to it again and again.
