Roasted Tomato Basil Soup

Featured in: One-Dish Kitchen Cooking

This rich and velvety Italian-inspired soup transforms simple ingredients into something extraordinary. Ripe tomatoes are oven-roasted with sweet onions and garlic until deeply caramelized, then blended with fresh basil and vegetable broth for maximum flavor depth.

The roasting process concentrates the natural sweetness of the tomatoes while creating subtle smoky notes. Finished with optional butter or cream for extra silkiness, this versatile soup adapts beautifully to vegan diets and pairs perfectly with crusty bread or croutons.

Updated on Wed, 28 Jan 2026 13:49:00 GMT
A bowl of roasted tomato basil soup topped with fresh basil and a swirl of cream, served alongside crispy croutons. Save
A bowl of roasted tomato basil soup topped with fresh basil and a swirl of cream, served alongside crispy croutons. | spoontally.com

The smell of caramelizing tomatoes drifting from my kitchen window one late August afternoon changed everything for me. I'd picked up far too many tomatoes at the farmers' market that morning, their skins still warm from the sun. Standing over the oven, watching their edges curl and darken, I knew this soup would be something special. My Italian grandmother never used a recipe card for her tomato soup, and now I understood why - the roasting process creates a depth you simply can't write down.

Last winter during that terrible snowstorm, I made this soup when my neighbor lost power. We huddled in my kitchen, steam fogging up the windows as I ladled the vibrant red soup into mismatched bowls. The electricity flickered threateningly a few times, but we just lit candles and kept eating. She still mentions that soup when we pass each other collecting mail - how it tasted like sunshine in the middle of February.

Ingredients

  • Ripe tomatoes: The foundation of this soup, and truly, the riper and more imperfect looking, the better - those knobby heirloom varieties contain the most intense flavor.
  • Yellow onion: Quartering rather than dicing allows the edges to caramelize beautifully in the oven, adding a subtle sweetness that balances the acidity of the tomatoes.
  • Garlic cloves: Roasting transforms them from sharp and pungent to mellow and nutty - I once accidentally doubled the amount and discovered it was actually an improvement.
  • Fresh basil: Added toward the end to preserve its brightness - I've tried dried basil in a pinch, but the difference is remarkable, so grow a little pot on your windowsill if you can.
  • Heavy cream: Just a swirl before serving creates little clouds in the soup that make it feel indulgent without overwhelming the roasted flavors.

Instructions

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Prep your veggies:
Halve those gorgeous tomatoes and quarter the onion, leaving the pieces substantial enough to develop caramelized edges. I like to leave the tomato skins on - they carry so much flavor and will blend up beautifully later.
Roast until magical:
Spread everything on your baking sheet with plenty of room to breathe, and don't rush this part. You're looking for those dark, concentrated spots that signal the natural sugars have developed.
Simmer and infuse:
As you combine the roasted treasures with broth, take a moment to inhale that steam - it's intoxicating. The butter melts into little golden pools on the surface before disappearing into the mix.
Blend with intention:
If using an immersion blender, start slowly from the bottom to avoid splashing that gorgeous red everywhere (learned this the hard way while wearing a white shirt). Work in batches if needed, ensuring everything becomes silky smooth.
Finishing touches:
This is where the soup becomes yours. A drizzle of cream creates beautiful swirls that you can drag through with the tip of a spoon, creating a marbled effect that's as pretty as it is delicious.
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Make fresh ice for iced coffee, cocktails, chilling ingredients, and keeping drinks cold while cooking.
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Silky smooth roasted tomato basil soup in a rustic white bowl, garnished with fresh basil and a drizzle of olive oil. Save
Silky smooth roasted tomato basil soup in a rustic white bowl, garnished with fresh basil and a drizzle of olive oil. | spoontally.com

My daughter called from college once, homesick and fighting a cold, asking how to make this soup in her dorm microwave. We laughed together at the impossibility, but I overnight-shipped her a container packed in dry ice instead. She called the next day to tell me it was better than medicine - that eating it was like being wrapped in a blanket. That moment convinced me food really can cross distances when we can't.

The Tomato Selection Secret

I've made this soup with supermarket tomatoes in January and sun-ripened garden tomatoes in August, and the difference is remarkable. If you're stuck with out-of-season tomatoes, roasting becomes even more crucial - it concentrates what little flavor they have. Sometimes I'll add a tablespoon of tomato paste to winter versions, stirring it into the hot pan after the vegetables are transferred, letting it toast slightly before adding the broth. This builds back some of that summer intensity we're all chasing.

Making It Ahead

This soup actually improves overnight, as the flavors meld and deepen in the refrigerator. I often make a double batch on Sunday afternoons, cooling it completely before refrigerating portions for the week ahead. The texture might thicken slightly in storage - just thin with a splash of broth when reheating. For freezing, I leave out the cream entirely and add it fresh when serving, which prevents any separation or graininess that can happen with dairy in the freezer.

Serving Suggestions

While perfectly wonderful on its own, this soup becomes a complete meal with thoughtful accompaniments. I've served it with grilled cheese sandwiches made with sharp cheddar and sourdough for casual dinners, and as an elegant first course in small cups before a pasta main. The bright acidity of the tomatoes cuts through rich dishes beautifully, making it an excellent starter for heavier meals.

  • For a stunning presentation, drizzle the cream in a spiral pattern and draw a toothpick through it from center to edge to create a spiderweb effect.
  • Tiny homemade croutons add wonderful texture - just toss bread cubes with olive oil, salt, and herbs, then toast until golden.
  • A small scoop of pesto instead of plain basil leaves transforms this into a different soup altogether - richer and more complex.
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Garnished bowl of homemade roasted tomato basil soup, paired with toasted bread for dipping, ready to enjoy. Save
Garnished bowl of homemade roasted tomato basil soup, paired with toasted bread for dipping, ready to enjoy. | spoontally.com

This soup has traveled with me through seasons and homes, always adapting slightly but remaining fundamentally comforting. I hope it brings the same warmth to your kitchen, whether made with precious summer tomatoes or as an act of defiance against winter.

Recipe FAQs

Can I freeze this soup?

Yes, this soup freezes exceptionally well for up to 3 months. Cool completely before transferring to airtight containers. Thaw overnight in the refrigerator and reheat gently, adding a splash of broth if needed to adjust consistency.

What tomatoes work best?

Roma, San Marzano, or vine-ripened tomatoes yield the best results due to their lower water content and intense flavor. Even less-than-perfect tomatoes become delicious through roasting, making this ideal for using end-of-season bounty.

How can I make it creamy without dairy?

Blend in a cooked potato or cannellini beans before pureeing for natural creaminess. Coconut milk or cashew cream also work beautifully as plant-based alternatives that maintain the luxurious texture.

Why roast the vegetables first?

Roasting concentrates natural sugars and creates deep caramelization that raw vegetables can't achieve. This essential step develops complex flavor layers, transforming simple ingredients into restaurant-quality depth.

Can I use canned tomatoes?

While fresh tomatoes are ideal, high-quality canned whole tomatoes work in a pinch. Drain them well and roast for just 20-25 minutes to develop some caramelization, though the flavor will be slightly less complex.

Roasted Tomato Basil Soup

Silky smooth Italian-style soup with caramelized roasted tomatoes, aromatic garlic, and fresh basil for ultimate comfort.

Prep time
15 minutes
Time to cook
45 minutes
Time required
60 minutes
Recipe by Ella Wilson


Skill level Easy

Cuisine Italian

Makes 4 Portions

Diet preferences No meat, No gluten

Needed ingredients

Roasted Vegetables

01 3.3 lbs ripe tomatoes, halved
02 1 large yellow onion, quartered
03 6 cloves garlic, peeled
04 2 tablespoons extra-virgin olive oil
05 1 teaspoon kosher salt
06 1/2 teaspoon freshly ground black pepper

Soup Base

01 2 cups low sodium vegetable broth
02 1/2 cup fresh basil leaves, packed
03 1 tablespoon unsalted butter, optional
04 1 teaspoon sugar, optional

Garnish

01 1/4 cup heavy cream or crème fraîche, optional
02 Fresh basil leaves
03 Croutons or toasted bread, optional

How to make it

Step 01

Preheat Oven: Preheat your oven to 425°F. Line a baking sheet with parchment paper.

Step 02

Prepare Vegetables: Arrange the halved tomatoes, onion quarters, and garlic cloves on the baking sheet. Drizzle with olive oil and sprinkle with salt and pepper. Toss to coat evenly.

Step 03

Roast Vegetables: Roast for 35 to 40 minutes until the tomatoes are caramelized and the onions are tender.

Step 04

Combine with Broth: Transfer the roasted vegetables and any juices to a large pot. Add vegetable broth and bring to a gentle simmer over medium heat.

Step 05

Add Flavorings: Stir in the fresh basil leaves, butter, and sugar if using. Simmer for 5 minutes to combine flavors.

Step 06

Blend Soup: Use an immersion blender to puree the soup until smooth. Alternatively, blend in batches in a countertop blender, then return to the pot.

Step 07

Finish and Season: Taste and adjust seasoning as needed. For a silkier texture, strain the soup through a fine sieve.

Step 08

Serve: Serve hot, drizzled with cream and garnished with fresh basil leaves and croutons or toasted bread if desired.

What you need

  • Baking sheet
  • Parchment paper
  • Large pot
  • Immersion blender or countertop blender
  • Fine sieve

Allergen details

Be sure to read over each ingredient for allergens. If unsure, check with your healthcare provider.
  • Contains dairy (butter, cream); omit or substitute with plant-based alternatives for dairy-free or vegan version.
  • Gluten may be present if served with croutons or bread; use gluten-free bread if needed.

Nutrition per serving

Details here are for your information only. Don't substitute for advice from your doctor.
  • Calorie count: 170
  • Fat content: 8 grams
  • Carbohydrates: 22 grams
  • Proteins: 4 grams