110 Grill Tomato Soup Recipe: Smoky Grillhouse Flavor in One Pot

This 110°F grill tomato soup transforms summer's bounty into restaurant-quality comfort in one pot. The secret? Grilling tomatoes and herbs over indirect heat until charred and sweet, then simmering them into a velvety, smoky soup that tastes like a late-night grillhouse meal. I perfected this technique after years of experimenting with grill flavors—this isn't your grandmother's soup, but a bold, smoky declaration of summer.

What makes this recipe special is the two-stage cooking process: first, the tomatoes and herbs hit the grill to develop deep, caramelized flavors, then everything comes together in a single pot for a hands-off finish. No fancy equipment needed—just your grill, a heavy pot, and about 45 minutes of active time (plus the grill's heat doing the work). The result? A soup so rich and aromatic, it'll have everyone asking for seconds.

By the end, you'll have a golden, velvety soup with charred edges and a smoky aroma that fills your kitchen. The texture is perfectly balanced—creamy enough to coat a spoon, with just enough body to feel substantial. This isn't just soup; it's a grillhouse experience you can serve straight from the pot, garnished with fresh basil and a drizzle of olive oil for that final touch of brightness.

The beauty of this recipe is its versatility—serve it as a starter for a summer BBQ, a light lunch with crusty bread, or even a cozy dinner when the nights start to cool. The flavors only deepen the next day, making it perfect for meal prep. Let's get cooking!

Ingredients for 110 grill tomato soup

Grill-charred tomatoes, fresh herbs, and smoky flavors—just 13 ingredients for restaurant-quality grillhouse soup.

The tomatoes are the soul of this soup. Heirloom or vine-ripened varieties develop the deepest flavor when grilled, but any firm, ripe tomatoes will work. I usually grab 4 lbs at the farmers market—they're sweeter and more aromatic. If you're using grocery store tomatoes, opt for Roma or beefsteak—they hold up better to grilling. The basil and thyme? Fresh is non-negotiable here. Buy extra—half goes on the grill, half gets torn over the finished soup. Look for vibrant green leaves with no yellowing; that's your quality indicator.

No grill? Broil the tomatoes on a sheet pan for 15 minutes, turning occasionally, until charred. Swapping the heavy cream? Coconut milk or cashew cream works beautifully, though the texture will be slightly lighter. Running short on fresh herbs? Dried thyme at one-third the amount is fine, but skip the dried basil—it has a completely different flavor profile. The vegetable broth can be homemade (just simmer veggie scraps with water) or store-bought—Pacific Foods or Imagine are my go-tos for low-sodium options. And if you're worried about the tomatoes splitting on the grill, score the bottom lightly with a knife before grilling.

This soup tastes even better the next day—make a double batch and freeze half for lazy weeknights. Store leftovers in the fridge for 4-5 days, or freeze for up to 3 months. The mozzarella shreds best when kept in the fridge until serving—it won't melt as much that way. For meal prep, I portion the soup into glass jars with tight lids; it reheats beautifully on the stovetop or in the microwave. The balsamic vinegar should be added just before serving—it brightens the flavors and prevents the soup from tasting flat when reheated.

Step-by-step instructions for grilled tomato soup

Here's how to transform fresh tomatoes into a rich, smoky soup with deep grillhouse flavor.

Preheat your grill to medium-high heat (about 400°F). Cut the 4 lbs large Roma tomatoes in half lengthwise and remove the cores. Halve the whole yellow onion and peel the 6 cloves garlic, then smash them lightly with the side of your knife.

Place the tomato halves, onion halves, and garlic cloves on the grill, cut-side down. Grill for 10-12 minutes, turning occasionally, until the tomatoes are deeply charred with blackened spots and the onions are soft and caramelized. You'll see the skins blister and darken—that's exactly what you want. Transfer everything to a large bowl and let cool slightly.

Here's the thing—grilling the vegetables first builds smoky depth that you can't replicate with raw ingredients. The charred skins will soften in the soup, releasing their concentrated flavor. If you don't have a grill, a grill pan or broiler works perfectly too.

Once the grilled vegetables have cooled enough to handle, peel off the charred skins from the tomatoes and onions. Discard the skins and place the flesh in a large pot with the grilled garlic. Add the 4 cups vegetable broth, 1.5 tsp sea salt, and 0.5 tsp black pepper. Bring to a gentle boil over medium heat, then reduce to a simmer for 10 minutes to meld the flavors.

While the mixture simmers, heat the 0.75 cup extra-virgin olive oil in a separate skillet over medium heat. Add the 1.5 cups fresh basil leaves and 0.25 cup fresh thyme, stirring for 1-2 minutes until the basil just begins to wilt. Remove from heat immediately—you don't want to cook the herbs to death.

This simmering step develops the soup's base. You'll notice the flavors deepen and become more complex as the liquid reduces slightly. The herbs in olive oil will add fresh, bright notes that balance the smoky tomato base.

Using an immersion blender, carefully blend the tomato-broth mixture directly in the pot until completely smooth. If you prefer, you can transfer it to a countertop blender, working in batches. The soup should be silky and velvety with no visible chunks. Taste and adjust seasoning with additional salt or pepper if needed.

Strain the soup through a fine-mesh sieve into a clean pot to remove any remaining herb stems or garlic pieces. Return the soup to medium-low heat and stir in the 1 cup heavy cream and 0.5 tsp red pepper flakes. Simmer gently for 5 minutes—just enough to warm through without curdling the cream.

This blending step creates the signature smooth texture. The straining ensures a refined finish, while the cream and red pepper flakes add richness and subtle heat. Don't let the soup boil after adding the cream, or you'll risk separating the mixture.

Ladle the hot soup into bowls and immediately top each serving with 1/6 cup fresh mozzarella (about 2 tablespoons per serving). Drizzle with 1/6 tablespoon balsamic vinegar (about 1 teaspoon per serving) and garnish with additional fresh basil leaves if desired.

The mozzarella should melt slightly from the soup's heat, creating little pockets of creamy goodness in each bite. The balsamic vinegar adds a bright, tangy contrast to the rich tomato base. Serve immediately while the mozzarella is still melty and the soup is steaming hot.

This finishing touch transforms the soup from ordinary to extraordinary. The contrast of textures and temperatures makes every spoonful exciting. For best results, serve with crusty bread to soak up the delicious broth.

Flavor customization for this dish

Spicy Kick

For a fiery twist, add 1 tsp smoked paprika and ½ tsp cayenne pepper to the grilled tomato mixture before blending. The smoky heat from the paprika pairs perfectly with the grillhouse flavors, while cayenne delivers a sharp, lingering burn. I like to balance it with an extra splash of heavy cream—about ¼ cup more—to mellow the heat while keeping the richness. 🌶️

Herb Variations

Swap the basil and thyme for rosemary and oregano for a Mediterranean vibe. Grill the herbs with the tomatoes, then blend them into the soup for an earthy, piney depth. For a brighter profile, try cilantro and mint—toss them in olive oil after grilling the tomatoes, then stir into the finished soup. Both combinations work beautifully with a drizzle of lemon juice instead of balsamic.

Smoky Depth

Boost the grillhouse flavor by adding 1 tbsp liquid smoke (like Alaskan Smokehouse) to the simmering broth. For an even deeper smokiness, grill 2-3 sprigs of fresh rosemary alongside the tomatoes—it adds a resinous aroma that’s pure comfort food magic. I also love adding ½ cup grilled corn kernels to the soup for a sweet, smoky contrast. 🔥

Creamy Upgrades

Swap the heavy cream for mascarpone cheese blended into the soup—it adds a luxurious tang without curdling. For a dairy-free option, blend ½ cup silken tofu with ½ cup coconut milk and stir it into the finished soup. Both alternatives keep the creamy texture while offering unique flavor profiles. The mascarpone version pairs especially well with a sprinkle of crispy fried sage on top.

Umami Boost

Add 1 tbsp soy sauce or 1 tsp fish sauce to the simmering broth for a savory depth that elevates the tomato flavor. For a vegetarian option, stir in 1 tbsp miso paste (white or red) after blending. These umami-rich additions work surprisingly well with the smoky grillhouse notes—just be mindful of the salt levels, as miso and soy can be potent. 💫

Sweet Contrast

Balance the smoky, spicy flavors with a touch of sweetness. Stir 1 tbsp honey or 1 tsp maple syrup into the finished soup to round out the flavors. For a more complex sweetness, add ½ cup grilled peaches or apricots (pitted and sliced) to the grill alongside the tomatoes. The caramelized fruit adds a luscious, jammy quality that’s pure summer indulgence. 🍯

Frequently asked questions