Name: Best Roasted Tomato Basil Soup Recipe
Prep time: 15 min
Cook time: 1 h
Total time: 1 h 15 min
Cuisine: American
Ingredients: 2 1/4 lbs Roma tomatoes, halved lengthwise; 1 1/4 lbs grape tomatoes (or cherry tomatoes); 8 cloves garlic, peeled and left whole; 2 small yellow onions, sliced just under 1/2-inch thick; 1 1/2 cups (26g) lightly packed fresh basil, divided; 4 1/2 Tbsp olive oil, divided; Salt, to taste; Black pepper, to taste; 5 cups low-sodium vegetable broth; Prepared grilled cheese (or grilled cheese croutons, optional)

Jump to Recipe· 4.4 from 2 reviews

If you are craving a comforting bowl of warmth that bursts with vibrant flavors, look no further than the Best Roasted Tomato Basil Soup Recipe. This classic soup elevates humble tomatoes to a whole new level by roasting them to caramelized perfection, infusing the broth with deep, rich sweetness, and balancing it beautifully with fresh basil’s lively aroma. Every spoonful is like a cozy hug on a chilly day, brightened by the garlic and onions roasted until golden, making this soup a guaranteed crowd-pleaser for family dinners or casual get-togethers.

Ingredients You’ll Need

The image shows fresh ingredients arranged on a white marbled surface. There are two clear glass bowls, one filled with large red tomatoes and the other filled with small, dark red grape tomatoes. Near the bowls, there is a carton of green and white vegetable broth standing upright in the center. To the top left, a small clear bowl containing yellow oil and a clear pepper grinder sit side by side. On the top right, a dark brown bowl is full of fresh green basil leaves. Two whole onions and several garlic cloves are placed in between the vegetable broth and the basil. photo taken with an iphone --ar 4:5 --v 7

The beauty of this recipe lies in the simplicity and quality of its ingredients. Each item plays a crucial role in creating a luxurious texture, vibrant color, and balanced flavors that define the Best Roasted Tomato Basil Soup Recipe.

Roma tomatoes (2 1/4 lbs, halved lengthwise): These meaty tomatoes roast beautifully, providing body and a natural sweetness to the soup.
Grape tomatoes (1 1/4 lbs): Smaller tomatoes add bursts of juiciness and an extra layer of concentrated flavor.
Olive oil (4 1/2 Tbsp, divided): Essential for roasting; it helps caramelize the vegetables and enhances richness.
Salt and black pepper: Simple seasoning that balances and enhances all the flavors.
Garlic cloves (8, peeled and left whole): Roasting softens garlic’s bite and unlocks its mellow sweetness.
Yellow onions (2 small, sliced just under 1/2-inch thick): Their natural sugars caramelize beautifully when roasted for added depth.
Fresh basil (1 1/2 cups lightly packed, divided): The fresh herb adds an aromatic, vibrant finish both in the cooking and as a garnish.
Low-sodium vegetable broth (5 cups): A gentle broth lets the roasted tomato flavor shine through without overpowering it.
Prepared grilled cheese or grilled cheese croutons (optional): The perfect companion to dunk or sprinkle on top for a nostalgic crunch.

How to Make Best Roasted Tomato Basil Soup Recipe

Step 1: Preheat and Prep the Tomatoes

Start by preheating your oven to 425 degrees Fahrenheit, which is the perfect temperature to roast your tomatoes until they’re slightly browned and deeply flavorful. Arrange your halved Roma tomatoes cut side upright on a rimmed baking sheet, then toss them with 3 tablespoons of olive oil and season generously with salt and pepper. This step ensures that each tomato absorbs the oil and seasoning evenly, setting the stage for that rich base flavor.

Step 2: Prepare the Onions and Garlic

On a separate rimmed half sheet pan, place your sliced onions alongside the whole peeled garlic cloves. Brush them thoroughly with the remaining 1 1/2 tablespoons of olive oil to help them roast to golden perfection. Sprinkle salt and pepper over them to enhance their natural sweetness and aromatic qualities as they caramelize in the oven.

Step 3: Roast the Vegetables

Place the two pans side by side in the oven. Roast the garlic for about 15 minutes until just golden, then remove it to prevent burning. Continue roasting the onions for 30 to 35 minutes until their edges become a beautiful golden brown, then take them out as well. Leave the tomatoes in the oven for 40 to 45 minutes until they have browned slightly and their flavor intensifies. This sequential removal keeps each component cooked to perfection.

Step 4: Combine and Simmer

Once roasted, pour the tomatoes, onions, and garlic into a large pot. Add 5 cups of low-sodium vegetable broth to bring everything together, along with about three-quarters of your fresh basil. Season with salt and pepper to taste. Bringing this mixture to a boil before covering and reducing the heat to simmer for 20 minutes allows the flavors to meld beautifully.

Step 5: Blend to Perfection

After simmering, use an immersion blender directly in the pot to puree the soup until silky smooth, or blend in smaller batches carefully if using a countertop blender. When blending in batches, fill the blender only halfway and remove the center insert from the lid—cover with a kitchen towel to prevent splatters yet allow steam to escape. Blending brings out the creamy texture that makes this the Best Roasted Tomato Basil Soup Recipe you will cherish.

How to Serve Best Roasted Tomato Basil Soup Recipe

Garnishes

A sprinkle of the remaining chopped fresh basil on top immediately brightens the soup’s presentation and adds a fresh punch of herbal flavor with every bite. If you want an extra touch of indulgence, a drizzle of good-quality olive oil or a few shavings of Parmesan cheese can elevate the dish further.

Side Dishes

This soup pairs perfectly with a classic grilled cheese sandwich, whether melted with your favorite cheese or transformed into crunchy grilled cheese croutons both for added texture and nostalgic comfort. A crisp green salad or simple garlic bread also complements the soup wonderfully for a balanced meal.

Creative Ways to Present

Serve the soup in rustic bowls with toasted bread sticks or homemade croutons scattered on top for a cozy feel. For a fancy touch, swirl in a spoonful of cream or dollop of pesto right before serving. Using a hollowed-out sourdough bread bowl offers an impressive and fun way to enjoy the soup, perfect for hosting friends or family dinners.

Make Ahead and Storage

Storing Leftovers

If you have any leftover soup, store it in an airtight container in the refrigerator for up to four days. The flavors actually deepen after resting, so reheating can be just as delicious—or even better—than the first serving.

Freezing

The Best Roasted Tomato Basil Soup Recipe freezes beautifully! Pour cooled soup into freezer-safe containers or heavy-duty freezer bags, leaving some space for expansion, and freeze for up to three months. This is a lifesaver when you want quick comfort food on busy weekdays.

Reheating

Reheat gently on the stove over medium-low heat, stirring occasionally to avoid sticking and evenly warm the soup. If it’s too thick after refrigeration or freezing, simply add a splash of vegetable broth or water to adjust the consistency. Microwave reheating is also quick but stir midway to prevent hot spots.

FAQs

Can I use other types of tomatoes?

Absolutely! While Roma and grape tomatoes are ideal for roasting because of their sweetness and texture, you can substitute with vine-ripened or plum tomatoes if needed. Just keep in mind that the flavor and liquid content may vary slightly.

Is it necessary to roast the garlic whole?

Yes, leaving the garlic cloves whole while roasting helps mellow their sharpness, turning them sweet and creamy. Roasting minced garlic would risk burning and bitterness.

Can I make this soup vegan?

Definitely! This recipe is naturally vegan when you use vegetable broth and skip any dairy garnishes. Feel free to add coconut cream for extra creaminess if you like.

How thick is the soup supposed to be?

The soup should be smooth and moderately thick but still spoonable. If you prefer it thinner, simply add more vegetable broth while simmering or when reheating.

What’s the best way to store fresh basil?

To keep basil fresh longer, treat it like cut flowers—trim the stems and place them in a glass of water on your counter, covered loosely with a plastic bag. Refrigeration can sometimes brown the leaves quickly.

Final Thoughts

There is something truly special about the Best Roasted Tomato Basil Soup Recipe that makes it a favorite in my kitchen and hopefully yours too. With its rich, roasted depth and vibrant herbal brightness, it’s a recipe that feels like home in every spoonful. I can’t wait for you to try it and share the joy of this wonderfully comforting dish with your loved ones!