Creamy Roasted Tomato Basil Soup – Easy 50-Minute Recipe

I first ladled out a bowl of roasted tomato soup at a tiny stone-walled trattoria in the hills above Lucca, where the owner, Signora Bianca, roasted her tomatoes in a wood oven until the skins blistered and the kitchen smelled like a Sunday afternoon. She refused to give me the recipe, so I spent three market mornings at her stall trading stories about Georgian tomatoes until she finally whispered the secret: roast first, blend last.

Back home I reworked her method for a home oven, and it has become the recipe people pin, save, and cook on repeat every September when gardens overflow. Roasting concentrates the sugars and caramelizes the edges, so you need nothing more than good olive oil, garlic, and a fistful of basil to taste like you simmered it all day.

This version is deliberately simple, pantry-friendly, and forgiving. Whether you grow your own tomatoes or rescue a sad supermarket punnet, the oven does the heavy lifting while you get on with your evening. Explore beyond the guidebook.

About the Ingredients

3 lb (1.4 kg) ripe Roma or plum tomatoes, halved lengthwise

Roma tomatoes are meaty and low in water, which means a thicker soup; if yours are watery, add 1 tablespoon tomato paste. In winter, canned San Marzano whole tomatoes drained work surprisingly well.

1 medium yellow onion, cut into 8 wedges

Yellow onion gives sweetness without bite. A red onion will work but turns the soup a slightly pinkish hue; shallots are a gentler substitute if onion is too strong for you.

1 medium Yukon Gold potato, peeled and cubed

This is the body-builder that replaces heavy cream. A russet potato works too but gets starchier, so use half of one.

6 garlic cloves, unpeeled

Roasting garlic in its skin makes it jammy and sweet instead of sharp. If you only have pre-peeled cloves, toss them in oil and roast 5 minutes less so they do not burn.

3 tbsp extra-virgin olive oil, plus more for drizzling

Use a fruity, cold-pressed oil for finishing and a cheaper one for roasting. Avocado oil is a fine high-heat substitute.

2 cups (480 ml) low-sodium vegetable or chicken broth

Homemade stock lifts this soup enormously; a good boxed stock is the next best thing. For a vegan bowl, check that your stock has no honey or dairy.

1 packed cup (30 g) fresh basil leaves, plus extra to serve

Add most of the basil off the heat so it stays bright green and fragrant. Frozen basil cubes are a decent winter stand-in, and Thai basil gives a lovely anise note.

1 tsp fine sea salt, plus more to taste

Kosher salt is less dense, so use about 1 1/2 teaspoons if substituting. Taste at the end, since tomato acidity varies batch to batch.

1/2 tsp freshly ground black pepper

Freshly cracked pepper is worth the extra seconds here. A pinch of red pepper flakes adds a gentle warmth if you like a little heat.

1 tsp balsamic vinegar, to finish

A splash of balsamic or sherry vinegar wakes up flat tomatoes. Lemon juice works if you want a brighter, sharper finish.

Tips & Tricks

• Do not crowd the pan. Spread the tomatoes cut-side up in a single layer with space between them; steam trapped between pieces means pale, watery soup instead of caramelized edges.
• Save the roasting juices. Tip every drop of the oily, tomato-stained liquid from the sheet pan into the pot, because that is where most of the flavor lives.
• Blend in batches and vent the lid. Hot liquid expands fast in a blender; fill it only halfway, hold a folded towel over the lid, and start on low speed.
• Balance at the end, not the start. Tomatoes vary wildly in acidity, so wait until the soup is blended before adjusting salt, vinegar, and a pinch of sugar.

Step-by-Step Instructions

1. Heat the oven

Preheat the oven to 425F (220C) and line a large rimmed sheet pan with parchment. A hot oven is essential for caramelizing the tomato sugars rather than just steaming them.

2. Toss and arrange

Toss the tomato halves, onion wedges, potato cubes, and unpeeled garlic with 3 tablespoons olive oil, 1 teaspoon salt, and the pepper. Arrange everything cut-side down in a single layer, leaving a little space between pieces.

3. Roast until blistered

Roast for 35 to 40 minutes, flipping the tomatoes cut-side up after 20 minutes. They are ready when the edges are deeply golden brown, the skins are wrinkled and splitting, and the onion tips are charred; the potato should pierce easily with a knife.

4. Squeeze the garlic

Let the tray cool for 5 minutes, then squeeze the soft roasted garlic out of its skins into a large pot. Scrape every bit of the roasted tomato, onion, potato, and pan juices in with it.

5. Simmer the base

Add the broth, bring to a gentle boil over medium-high heat, then reduce to a simmer. Cook for 8 to 10 minutes, until the potato is fully tender and the liquid has reduced slightly, about 1 1/2 inches below where it started.

6. Blend until silky

Add most of the basil, then blend in batches or with a stick blender until completely smooth, about 60 seconds. For a truly velvety texture, pass it through a fine-mesh sieve, pressing with a ladle.

7. Season and finish

Return the soup to low heat and stir in the balsamic vinegar. Taste and adjust salt, pepper, and a pinch of sugar if the tomatoes are sharp; the soup should taste bright, sweet, and deeply savory.

8. Serve warm

Ladle into bowls and top with torn basil, a drizzle of olive oil, and a crack of pepper. Serve with grilled cheese or crusty bread for dipping.

Delicious Variations

Smoky Roasted Red Pepper

Swap one-third of the tomatoes for 2 roasted red bell peppers and add 1/2 teaspoon smoked paprika before blending.

Coconut Basil Cream

Replace the broth with full-fat coconut milk and vegetable stock in equal parts, then finish with lime juice for a Thai-inspired bowl.

Roasted Garlic and Herb

Double the garlic and add 1 teaspoon dried oregano and a sprig of rosemary to the tray before roasting for a more herbal, Mediterranean profile.

How to Store Pinterest-Worthy Roasted Tomato Basil Soup

Frequently Asked Questions

Roast a tray this week, blend it while the kitchen still smells of basil and sweet tomatoes, and pin the result so future-you remembers exactly how good a simple bowl can be. Then tell me in the comments whether you went smoky, coconutty, or classic. Explore beyond the guidebook.

Pinterest-Worthy Roasted Tomato Basil Soup

Creamy Roasted Tomato Basil Soup turns ripe summer tomatoes into a silky, restaurant-worthy bowl with deep roasted flavor and fresh basil.

★★★★½ 4.8 (243 ratings)

15 minPrep time35 minCook time6Servings185 kcalCalories

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🧂 Ingredients

• 3 lb (1.4 kg) ripe Roma or plum tomatoes, halved lengthwise
• 1 medium yellow onion, cut into 8 wedges
• 1 medium Yukon Gold potato, peeled and cubed
• 6 garlic cloves, unpeeled
• 3 tbsp extra-virgin olive oil, plus more for drizzling
• 2 cups (480 ml) low-sodium vegetable or chicken broth
• 1 packed cup (30 g) fresh basil leaves, plus extra to serve
• 1 tsp fine sea salt, plus more to taste
• 1/2 tsp freshly ground black pepper
• 1 tsp balsamic vinegar, to finish

📋 Instructions

1. 1Heat the oven — Preheat the oven to 425F (220C) and line a large rimmed sheet pan with parchment. A hot oven is essential for caramelizing the tomato sugars rather than just steaming them.
2. 2Toss and arrange — Toss the tomato halves, onion wedges, potato cubes, and unpeeled garlic with 3 tablespoons olive oil, 1 teaspoon salt, and the pepper. Arrange everything cut-side down in a single layer, leaving a little space between pieces.
3. 3Roast until blistered — Roast for 35 to 40 minutes, flipping the tomatoes cut-side up after 20 minutes. They are ready when the edges are deeply golden brown, the skins are wrinkled and splitting, and the onion tips are charred; the potato should pierce easily with a knife.
4. 4Squeeze the garlic — Let the tray cool for 5 minutes, then squeeze the soft roasted garlic out of its skins into a large pot. Scrape every bit of the roasted tomato, onion, potato, and pan juices in with it.
5. 5Simmer the base — Add the broth, bring to a gentle boil over medium-high heat, then reduce to a simmer. Cook for 8 to 10 minutes, until the potato is fully tender and the liquid has reduced slightly, about 1 1/2 inches below where it started.
6. 6Blend until silky — Add most of the basil, then blend in batches or with a stick blender until completely smooth, about 60 seconds. For a truly velvety texture, pass it through a fine-mesh sieve, pressing with a ladle.
7. 7Season and finish — Return the soup to low heat and stir in the balsamic vinegar. Taste and adjust salt, pepper, and a pinch of sugar if the tomatoes are sharp; the soup should taste bright, sweet, and deeply savory.
8. 8Serve warm — Ladle into bowls and top with torn basil, a drizzle of olive oil, and a crack of pepper. Serve with grilled cheese or crusty bread for dipping.

👨‍🍳 Chef's Note: If your tomatoes are especially juicy, roast them 10 minutes longer before blending; a drier tray means a thicker, more intensely flavored soup.

Servings: 6

Cuisine: Italian-American

Course: Soup

Nutrition (per serving): 185 kcal · 4g protein · 22g carbs · 9g fat

Written by Elena Petrova

Elena writes about travel and cultural immersion, focusing on off-the-beaten-path destinations and authentic experiences. She shares practical advice for budget-conscious travelers who want to connect with local communities.