Roasted Tomato Basil Soup

Featured in: Home Table Recipes

This roasted tomato basil soup transforms simple ingredients into a luxurious Italian classic. The process begins with oven-roasting ripe tomatoes, sweet onions, and garlic until caramelized and deeply flavored. After roasting, the vegetables are simmered with vegetable broth and fresh basil, then pureed into a silky, velvety texture. The optional butter and cream add richness, while a touch of sugar balances the natural acidity. The result is a restaurant-quality soup that's surprisingly simple to make. Perfect for cozy dinners or elegant entertaining, this vegetarian and gluten-free soup pairs beautifully with crusty bread and a crisp white wine.

Updated on Wed, 28 Jan 2026 14:21:00 GMT
A bowl of creamy Roasted Tomato Basil Soup, garnished with fresh basil and a drizzle of cream. Pin It
A bowl of creamy Roasted Tomato Basil Soup, garnished with fresh basil and a drizzle of cream. | casaflavors.com

The air in my apartment always feels a bit heavy until the scent of roasting tomatoes starts drifting from the oven. I once haphazardly threw some bruised heirlooms onto a tray during a rainy Tuesday because I could not bear to see them go to waste. That kitchen was tiny and the vent fan barely worked but the steam rising from the pot felt like a warm hug. It turned a dreary evening into something that felt purposeful and calm. This soup has since become my go to remedy for any day that feels a little too long.

Bringing this pot to the table during a loud family game night changed the whole energy of the room. My brother usually complains about anything vegetarian but he was too busy dipping crusty sourdough into the red pool of soup to say a word. We sat there with red stained napkins and laughed until our sides ached while the wind rattled the windowpanes outside. There is something about the bright acidity of the basil that makes everyone feel a little more alive. It proved that simple ingredients can hold their own against the fanciest of meals.

Ingredients

  • Ripe Tomatoes: Look for the ones that feel heavy for their size and have a deep red hue because they hold the most juice for the roasting process.
  • Yellow Onion: Quartering these allows the edges to char slightly in the oven which adds a subtle smoky sweetness to the finished blend.
  • Garlic Cloves: Leave these tucked near the tomatoes so they steam in the oil rather than burning in the high heat.
  • Extra Virgin Olive Oil: Use the good stuff here as it carries the flavor of the roasted vegetables into every single spoonful.
  • Vegetable Broth: Choose a low sodium version so you have total control over the final saltiness of your masterpiece.
  • Fresh Basil: Tearing the leaves by hand instead of chopping them prevents the edges from bruising and keeps the aroma sharp and bright.
  • Unsalted Butter: Adding a cold pat at the very end creates a glossy finish that makes the soup feel incredibly luxurious on the tongue.

Instructions

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Prep the Roast:
Heat your oven to 220C and spread the halved tomatoes and onions across a parchment lined sheet until they look like a colorful mosaic. Drizzle the oil and seasonings over everything and give it a quick toss with your hands to ensure every surface is glistening.
The Oven Magic:
Slide the tray in and wait for about 40 minutes until the tomato skins start to pucker and turn a beautiful charred gold. Your kitchen will start to smell like a rustic Italian villa as the natural sugars caramelize and bubble.
Combine and Simmer:
Scrape every bit of juice and blackened bits into a heavy pot before pouring in the broth to wake up those concentrated flavors. Let it bubble gently for a few minutes while you stir in the basil and butter to create a fragrant base.
The Big Blend:
Use an immersion blender to swirl through the vegetables until the mixture transforms into a silky vibrant orange liquid. For a truly professional feel you can pass it through a sieve but the rustic texture is just as charming.
Final Touches:
Give it a taste to see if a pinch of sugar or extra salt is needed to make the flavors pop. Ladle it into bowls while it is steaming hot and watch the cream swirl into the red depths like a tiny storm.
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Silky Roasted Tomato Basil Soup served hot with crunchy croutons and fresh basil leaves. Pin It
Silky Roasted Tomato Basil Soup served hot with crunchy croutons and fresh basil leaves. | casaflavors.com

One cold October evening I made this for a friend who was nursing a broken heart and we sat on the floor in silence just eating. The warmth of the bowl seemed to do more than any words could at that moment. By the time we reached the bottom of the pot the atmosphere had shifted from heavy to hopeful. It reminded me that a hot meal is sometimes the simplest form of empathy we can offer. Now every time I smell basil and garlic roasting I think of that quiet resilience.

The Secret of the Char

Letting the onions get those dark crispy edges is not a mistake but a flavor strategy. Those bits of caramelization dissolve into the broth and provide an earthy backbone that raw onions simply cannot match. I learned this after accidentally leaving a tray in for five minutes too long and realizing the soup tasted twice as complex.

Texture is Everything

Some days I want a chunky rustic mash that feels like a garden harvest and other days I want a refined velvet texture. If you choose to strain the soup through a fine mesh you lose some bulk but gain a sophisticated mouthfeel that rivals any bistro. It is worth the extra five minutes of effort if you are hosting a dinner party.

Perfect Pairings

No bowl of tomato soup is truly complete without a companion to soak up the leftover liquid at the bottom. I usually lean toward a sharp cheddar grilled cheese but a simple piece of toasted focaccia works wonders too. The crunch of the bread against the softness of the soup is the ultimate sensory contrast.

  • Try a splash of balsamic vinegar at the end for a tangy zing.
  • Add red pepper flakes if you want a slow heat to build in the back of your throat.
  • Keep the cream on the side so guests can swirl their own patterns.
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Homemade Roasted Tomato Basil Soup in a rustic bowl, topped with basil and cream. Pin It
Homemade Roasted Tomato Basil Soup in a rustic bowl, topped with basil and cream. | casaflavors.com

This soup is a celebration of what happens when heat meets humble garden ingredients. I hope every spoonful brings as much comfort to your table as it has to mine.

Recipe FAQs

Can I freeze this roasted tomato basil soup?

Yes, this soup freezes exceptionally well. Allow it to cool completely, then transfer to airtight containers or freezer bags. It will keep for up to 3 months. Thaw overnight in the refrigerator and reheat gently on the stovetetop, adding a splash of broth if needed to adjust consistency.

What type of tomatoes work best for roasting?

Roma or plum tomatoes are ideal due to their meaty texture and lower water content, but any ripe tomatoes will work beautifully. Vine-ripened or heirloom varieties offer exceptional sweetness and flavor. Even slightly overripe tomatoes work perfectly since roasting concentrates their natural sugars.

How can I make this soup vegan?

Simply omit the butter and cream, or replace them with plant-based alternatives. Coconut cream or cashew cream add wonderful richness. A small amount of olive oil can substitute for butter when sautéing. The soup remains delicious and satisfying without dairy.

Do I need to peel the tomatoes before roasting?

No, peeling is unnecessary. The skins soften during roasting and blend smoothly into the soup. If you prefer an extra silky texture, simply strain the pureed soup through a fine sieve after blending. This step removes any remaining skins or tomato bits while keeping all the flavor.

What's the best way to reheat leftovers?

Reheat gently over medium-low heat, stirring occasionally to prevent scorching. If the soup has thickened in the refrigerator, add a splash of vegetable broth or water to reach desired consistency. Avoid boiling, as high heat can affect the texture and delicate flavor.

Can I use dried basil instead of fresh?

While dried basil can work in a pinch, fresh basil provides the bright, aromatic flavor essential to this dish. If using dried, add it during roasting rather than at the end, and use about one-third the amount. However, fresh basil is strongly recommended for authentic Italian flavor.

Roasted Tomato Basil Soup

Rich, velvety soup featuring oven-roasted tomatoes, aromatic garlic, sweet onions, and fresh basil blended into silky Italian perfection.

Prep Time
15 mins
Time to Cook
45 mins
Overall Time
60 mins
Created by Fiona Chambers


Skill Level Easy

Cuisine Type Italian

Makes 4 Portions

Dietary 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

How to Make It

Step 01

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

Step 02

Prepare vegetables: Arrange 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 tomatoes are caramelized and onions are tender.

Step 04

Combine with broth: Transfer roasted vegetables and any 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

Finish and season: Taste and adjust seasoning as needed. For silkier texture, strain 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.

Equipment Needed

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

Allergy Info

Be sure to look over every ingredient for allergens, and talk to a health expert with any concerns.
  • Contains dairy in butter and 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 per Serving

Nutritional info is for general reference and isn't medical guidance.
  • Caloric Value: 170
  • Fats: 8 g
  • Carbohydrates: 22 g
  • Proteins: 4 g