Roasted Tomato Basil Soup

Featured in: Comfort Meals At Home

This luxurious Italian soup transforms simple ingredients into restaurant-quality comfort. Start by roasting ripe tomatoes, sweet onions, and garlic until caramelized and tender. The roasting process concentrates natural sugars, creating deep, complex flavors that form the soup's foundation.

After roasting, blend the vegetables with vegetable broth and fresh basil leaves until silky smooth. Optional butter adds richness while a touch of sugar balances any acidity. The result is a vibrant, aromatic bowl that's both elegant and comforting.

Perfect for cold evenings or as an impressive starter for dinner parties. Garnish with cream, fresh basil, or crusty bread for the ultimate cozy experience. This versatile soup adapts beautifully to vegan diets with simple substitutions.

Updated on Wed, 28 Jan 2026 11:28:00 GMT
A bowl of creamy roasted tomato basil soup, garnished with fresh basil and a swirl of cream. Save
A bowl of creamy roasted tomato basil soup, garnished with fresh basil and a swirl of cream. | sweetcasakitchen.com

The first time I made this soup, it was a rainy Tuesday and I had way too many tomatoes from my CSA box threatening to go soft. My kitchen filled with this incredible roasted smell that had my roommate wandering in, asking what restaurant I'd ordered from. That moment of realizing something this luxurious came from such humble ingredients changed how I thought about soup entirely.

I served this at a dinner party once when I was completely broke, feeling embarrassed that I couldnt afford something more impressive. My friend Sarah took one sip and literally said she would pay for this at a fancy bistro, which just goes to show that sometimes the simplest ingredients treated with respect create the most memorable meals.

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Ingredients

  • Ripe tomatoes: The quality really matters here since roasting concentrates their flavor, and slightly overripe ones actually caramelize beautifully
  • Yellow onion: Sweet onions work best because they become almost candy-like when roasted, adding natural sweetness that balances the tomatoes acidity
  • Fresh garlic: Roasting whole cloves mellows the sharp bite into something creamy and subtle that blends perfectly into the soup
  • Extra-virgin olive oil: This helps the vegetables roast evenly and adds that unmistakable Mediterranean richness you cant get from other oils
  • Fresh basil: Dont add this during roasting or it will turn bitter, stir it in at the very end to preserve that bright, peppery aroma
  • Vegetable broth: Low sodium lets you control the seasoning completely, and a good quality broth makes a noticeable difference in the finished depth

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Instructions

Roast the vegetables:
The oven should be nice and hot at 220°C so everything gets those gorgeous charred edges and caramelized spots
Simmer the base:
Add the broth to your roasted vegetables and let it bubble gently for about five minutes so all those roasted flavors meld together
Blend it smooth:
An immersion blender makes this incredibly easy right in the pot, but if you use a regular blender, work in batches and leave the steam vent open
Finish with basil:
Stir in the fresh basil right at the end and taste again, adjusting salt or adding a pinch of sugar if the tomatoes are particularly acidic
Homemade roasted tomato basil soup topped with crunchy croutons, served alongside a toasted bread slice. Save
Homemade roasted tomato basil soup topped with crunchy croutons, served alongside a toasted bread slice. | sweetcasakitchen.com

My dad still talks about the time I made this for him when he was recovering from surgery, saying it was the only thing that actually tasted good and made him feel comforted. Sometimes food really is love in its most tangible form.

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Making It Your Own

Ive discovered that a splash of balsamic vinegar right before blending adds this incredible depth that people can never quite identify. Some nights I add red pepper flakes if I want something with a little kick, especially when its cold outside and I need that extra warmth.

The Texture Secret

Straining the soup through a fine sieve takes an extra five minutes but transforms it from good to restaurant-quality. The first time I bothered with this step, I couldnt believe how smooth and elegant the final bowl looked and felt.

Serving Suggestions

A swirl of cream on top makes for a beautiful presentation, but honestly, this soup stands perfectly on its own with just some good bread for dipping. I love serving it with a simple green salad dressed with lemon vinaigrette to cut through the richness.

  • Croutons made from stale bread work perfectly here and prevent waste
  • A drizzle of really good olive oil on top right before serving adds freshness
  • Keep some extra basil leaves whole for garnish to show what flavors are inside
Oven-roasted tomatoes and garlic blended into a vibrant, silky smooth tomato basil soup in a white bowl. Save
Oven-roasted tomatoes and garlic blended into a vibrant, silky smooth tomato basil soup in a white bowl. | sweetcasakitchen.com

This is the soup I turn to whenever I need to feel like Im taking care of myself properly. Something about the rich color and warmth just makes everything better.

Questions & Answers

Can I make this soup ahead of time?

Absolutely. This soup actually develops deeper flavors when made 1-2 days ahead. Store in an airtight container in the refrigerator and reheat gently on the stove, adding a splash of broth if needed to adjust consistency.

What tomatoes work best for roasting?

Roma or plum tomatoes are ideal due to their lower water content and intense flavor. However, any ripe, in-season tomatoes will produce excellent results. Vine-ripened varieties offer the sweetest, most robust flavor profile.

How do I achieve the smoothest texture?

Use an immersion blender directly in the pot for convenience, or blend in batches using a countertop blender. For the silkiest results, strain the pureed soup through a fine-mesh sieve to remove any remaining fibrous bits or seeds.

Can I freeze this soup?

Yes, this freezes beautifully for up to 3 months. Cool completely before transferring to freezer-safe containers, leaving space for expansion. Thaw overnight in the refrigerator and reheat gently. Skip cream garnish until serving.

What can I serve with this soup?

Crusty garlic bread, grilled cheese sandwiches, or homemade croutons are classic pairings. For a lighter option, serve with a simple green salad dressed with balsamic vinaigrette to complement the soup's rich flavors.

How can I make this soup vegan?

Simply omit the butter and use olive oil instead. Replace cream garnish with coconut cream, cashew cream, or a drizzle of high-quality extra-virgin olive oil. The soup remains deliciously creamy and satisfying without dairy.

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Roasted Tomato Basil Soup

Oven-roasted tomatoes and fresh basil create this silky, aromatic Italian soup perfect for cozy dinners.

Prep Time
15 min
Time to Cook
45 min
All-In Time
60 min
Created by Violet King


Skill Level Easy

Cuisine Italian

Makes 4 Portions

Diet Details Vegetarian, Gluten-Free

What You'll Need

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

Directions

Step 01

Prepare Baking Station: Preheat oven to 425°F. Line a baking sheet with parchment paper.

Step 02

Arrange Vegetables for Roasting: Arrange halved tomatoes, onion quarters, and garlic cloves on prepared 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 tomatoes are caramelized and onions are tender.

Step 04

Build Soup Base: Transfer roasted vegetables and any accumulated juices to a large pot. Add vegetable broth and bring to a gentle simmer over medium heat.

Step 05

Infuse Flavors: Stir in 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 soup until smooth. Alternatively, blend in batches in a countertop blender and return to pot.

Step 07

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

Step 08

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

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Tools Needed

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

Allergy Warnings

Make sure to check every ingredient for allergens. If unsure, talk to 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
  • Always verify ingredient labels for hidden allergens

Nutrition Info (per serving)

Nutritional details are shared for information only; always consult a professional for advice.
  • Calorie Count: 170
  • Fats: 8 g
  • Carbohydrates: 22 g
  • Proteins: 4 g

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