If you have ever scrolled past a gorgeous bowl of ruby-red soup and thought, I want that for dinner tonight, this Creamy Roasted Tomato Basil Soup is the one to pin and actually make. Roasting the tomatoes concentrates their sweetness, and a quick blend turns everything silky without a drop of cream you will miss.
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I keep this recipe in heavy rotation from late summer, when the garden is exploding, straight through January, when a can of San Marzano tomatoes saves the day. It comes together in one pot plus one sheet pan, and the whole kitchen smells like a trattoria.
Serve it with a grilled cheese, a swirl of olive oil, and torn basil on top. You will look like you spent all day stirring, and I will never tell.
Why You'll Love This Recipe
About the Ingredients
3 lb (1.4 kg) ripe Roma or plum tomatoes, halved lengthwise
Romas are meaty and low in water, which means a thicker soup. In winter, swap in two 28-oz cans of San Marzano tomatoes, drained, and roast them on the sheet pan the same way.
1 large yellow onion, cut into 6 wedges
Yellow onion gives a sweeter, rounder base than red. A white onion or two large shallots work just as well if that is what you have.
6 garlic cloves, peeled and left whole
Whole cloves roast into soft, sweet little flavor bombs instead of burning. If you only have garlic powder, add 1 teaspoon at the blending stage.
3 tbsp (45 ml) extra-virgin olive oil, divided
Use a fruity, everyday olive oil for roasting and save your best bottle for drizzling at the end. Avocado oil is a fine neutral swap.
1 tsp kosher salt, plus more to taste
Kosher salt seasons evenly and is forgiving. If using fine table salt, start with 3/4 teaspoon and adjust at the end.
1/2 tsp freshly ground black pepper
Fresh-cracked pepper blooms in the oven. A pinch of red pepper flakes adds a gentle backnote of heat if you like.
4 cups (960 ml) low-sodium vegetable or chicken broth
Low-sodium lets you control the final seasoning. For a thicker, more tomato-forward soup, use 3 cups instead.
1 packed cup (20 g) fresh basil leaves, plus more for garnish
Add most of the basil off the heat so it stays bright green and fragrant. Frozen basil or 2 teaspoons dried basil are acceptable stand-ins.
1/2 cup (120 ml) heavy cream or full-fat coconut milk
Cream gives the classic silky finish; coconut milk keeps it dairy-free with a subtle sweetness. A swirl of whole milk works in a pinch.
1 tbsp (15 ml) balsamic vinegar
A tiny hit of balsamic sharpens the sweetness of the roasted tomatoes. Red wine vinegar or a squeeze of lemon juice does the same job.
Tips & Tricks
- Do not crowd the sheet pan. If the tomatoes overlap, they steam instead of roast and you lose that caramelized depth. Use two pans if needed.
- Blend in batches and never fill the blender more than halfway with hot liquid. Leave the lid vented and cover it with a folded towel so steam can escape safely.
- Season at the end, not the start. Roasted tomatoes and reduced broth concentrate in flavor, so taste after blending and add salt in small pinches.
Pro Tips
Step-by-Step Instructions
1. Heat the oven
Preheat the oven to 425 F (220 C) and line a large rimmed sheet pan with parchment. A hot oven is what gives the tomatoes their sweet, jammy edges.
2. Toss and roast
Toss the tomato halves, onion wedges, and garlic cloves with 2 tablespoons of olive oil, the salt, and pepper. Spread everything cut-side down in a single layer and roast for 35 minutes, until the tomato skins are wrinkled and the onion edges are deeply golden.
3. Simmer the base
Scrape the roasted vegetables and all their juices into a large pot, then add the broth. Bring to a gentle boil over medium-high heat, then reduce to a simmer and cook for 10 minutes so the flavors marry.
4. Wilt the basil
Turn off the heat and stir in the basil leaves and balsamic vinegar. Let them sit for 2 minutes to soften and release their oils, which keeps the color vivid.
5. Blend until silky
Working in batches, blend the soup until completely smooth, about 60 seconds per batch. Return it to the pot and set over low heat.
6. Finish with cream
Stir in the heavy cream and the remaining tablespoon of olive oil. Warm through for 3 to 4 minutes without boiling, then taste and adjust the salt.
7. Serve and garnish
Ladle into bowls and top with torn basil, cracked pepper, and a swirl of olive oil. Serve hot with crusty bread or a grilled cheese for dipping.
Delicious Variations
Smoky Roasted Red Pepper
Roast 2 red bell peppers alongside the tomatoes and blend them in for a sweeter, smokier soup.
Spicy Arrabbiata Style
Add 1/2 teaspoon red pepper flakes before roasting and finish with a pinch of smoked paprika.
Creamy Tomato Tortellini
Stir 2 cups of cooked cheese tortellini into the finished soup and simmer 2 minutes for a heartier one-bowl meal.
How to Store Pinterest-Perfect Roasted Tomato Basil Soup
Refrigerator
Cool completely, then store in an airtight container for up to 5 days. The soup thickens as it chills, so loosen it with a splash of broth when reheating.
Freezer
Freeze in portioned jars or freezer bags for up to 3 months. Leave 1 inch of headspace, and thaw overnight in the refrigerator before reheating.
Reheating
Warm gently over medium-low heat, stirring often, until steaming but not boiling. Add broth or a splash of cream if it looks too thick.
Frequently Asked Questions
Q: Can I make this soup with canned tomatoes?
Yes, and it is excellent. Use two 28-ounce cans of San Marzano tomatoes, drained, and roast them on the sheet pan exactly as directed; the oven time concentrates them and removes the tinny edge.
Q: How do I make this tomato basil soup dairy-free?
Swap the heavy cream for full-fat coconut milk or oat cream and use vegetable broth. The coconut milk adds a faint sweetness that actually complements the roasted tomatoes beautifully.
Q: Why is my tomato soup bitter?
Bitterness usually comes from scorched garlic or underripe tomatoes. Keep the garlic cloves whole so they roast instead of burn, and add a pinch of sugar or an extra drizzle of balsamic to round out the acidity.
Q: Can I use dried basil instead of fresh?
Yes, use 2 teaspoons of dried basil and add it with the broth so it has time to hydrate. Fresh basil is still best for the garnish, but dried works fine in the soup itself.
Q: How do I get a really smooth tomato soup?
Blend it longer than you think you need to, at least 60 seconds per batch, and then strain it through a fine-mesh sieve. A high-speed blender gets it nearly perfect on its own.
Pin this one now, because the next cold, rainy night is coming whether you are ready or not. Grab your ripest tomatoes, roast them until they collapse, and let the blender do the rest. Cook smart, eat happy.
Pinterest-Perfect Roasted Tomato Basil Soup
Creamy Roasted Tomato Basil Soup turns ripe tomatoes and fresh basil into a silky, cozy bowl with deep caramelized flavor. Easy, freezer-friendly comfort.
🧂 Ingredients
- 3 lb (1.4 kg) ripe Roma or plum tomatoes, halved lengthwise
- 1 large yellow onion, cut into 6 wedges
- 6 garlic cloves, peeled and left whole
- 3 tbsp (45 ml) extra-virgin olive oil, divided
- 1 tsp kosher salt, plus more to taste
- 1/2 tsp freshly ground black pepper
- 4 cups (960 ml) low-sodium vegetable or chicken broth
- 1 packed cup (20 g) fresh basil leaves, plus more for garnish
- 1/2 cup (120 ml) heavy cream or full-fat coconut milk
- 1 tbsp (15 ml) balsamic vinegar
📋 Instructions
- 1Heat the oven — Preheat the oven to 425 F (220 C) and line a large rimmed sheet pan with parchment. A hot oven is what gives the tomatoes their sweet, jammy edges.
- 2Toss and roast — Toss the tomato halves, onion wedges, and garlic cloves with 2 tablespoons of olive oil, the salt, and pepper. Spread everything cut-side down in a single layer and roast for 35 minutes, until the tomato skins are wrinkled and the onion edges are deeply golden.
- 3Simmer the base — Scrape the roasted vegetables and all their juices into a large pot, then add the broth. Bring to a gentle boil over medium-high heat, then reduce to a simmer and cook for 10 minutes so the flavors marry.
- 4Wilt the basil — Turn off the heat and stir in the basil leaves and balsamic vinegar. Let them sit for 2 minutes to soften and release their oils, which keeps the color vivid.
- 5Blend until silky — Working in batches, blend the soup until completely smooth, about 60 seconds per batch. Return it to the pot and set over low heat.
- 6Finish with cream — Stir in the heavy cream and the remaining tablespoon of olive oil. Warm through for 3 to 4 minutes without boiling, then taste and adjust the salt.
- 7Serve and garnish — Ladle into bowls and top with torn basil, cracked pepper, and a swirl of olive oil. Serve hot with crusty bread or a grilled cheese for dipping.
Elena focuses on healthy cooking and meal prep for people with limited time and budget. She shares flexible recipes and shortcuts that don’t sacrifice flavor.
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