Schlotzsky’s Tomato Basil Soup Recipe: Copycat Creamy Herb-Infused Bowl

This copycat version brings the creamy comfort of Schlotzsky’s famous soup to your kitchen. I’ve tested this recipe through multiple batches in my small Boston apartment to nail the balance.

The secret lies in slow-simmering canned tomatoes with fresh basil and a touch of cream. It’s a straightforward process that builds layers of herb-infused flavor without complicated techniques.

What you’ll get is a velvety, restaurant-quality bowl that hits all the right notes—sweet tomatoes, aromatic basil, and that signature rich texture. The vegetarian dish comes together in under an hour.

Perfect for chilly evenings or whenever you need a taste of your favorite deli’s signature soup. Here’s how to make it.

Ingredients for Schlotzsky’s Tomato Basil Soup

Pantry staples plus fresh herbs create this velvety, herb-infused favorite at home.

The tomatoes are the foundation here. San Marzano (from a can—don’t judge) give that sweet, low-acid base Schlotzsky’s is known for. Whole Foods or Trader Joe’s both stock them, and yes, the canned kind are better than fresh for this. Fresh basil is non-negotiable though—look for bright green leaves with no wilting. I grab mine from the farmers market when I can (the scent alone sells it).

No San Marzano? Any good-quality canned tomato works in a pinch.Heavy cream is ideal for that signature richness, but half-and-half at twice the amount gets you close. Out of fresh basil? Dried at one-third the quantity (though the flavor won’t be the same). The vegetable stock can be homemade or store-bought—Better Than Bouillon is my go-to for depth without the sodium overload.

This tastes even better the next day once flavors meld. Keeps 3-4 days in the fridge (reheat gently—don’t boil). Freezes beautifully for up to 3 months if you double the batch. Pro tip: freeze in portions so you can thaw just what you need.

Step-by-Step Instructions for Creamy Tomato Basil Soup

This method delivers that velvety texture and herb depth you expect from the original.

Step 1: Sauté Aromatics to Build Flavor Base

Heat the 2 tbsp Extra-Virgin Olive Oil in a large pot over medium heat. Add the diced Yellow Onion and cook for 5-6 minutes until it turns translucent and slightly golden at the edges. I always keep the heat steady here—too high and the onion burns, too low and it steams instead of caramelizing.

Add the minced 4 cloves Garlic Cloves and cook for 30 seconds until it releases its fragrance. Stir in the 1 tsp Dried Oregano and 1 tsp Dried Thyme, rubbing them between your fingers as you add them to release their oils. This creates the aromatic foundation that makes this soup taste authentic.

Step 2: Simmer Tomatoes with Seasonings

Pour in the 2 cans Canned San Marzano Tomatoes with their juices, crushing them slightly with your hands as you add them. Stir in the 2 cups Vegetable Stock, 1 tbsp Granulated Sugar, 1 whole Bay Leaf, 1 tsp Kosher Salt, and 0.5 tsp Freshly Ground Black Pepper.

Bring the mixture to a boil, then reduce heat to low. Let it simmer for 20-25 minutes until the tomatoes break down completely and the flavors meld. You’ll notice the liquid reducing slightly and the color deepening—that’s when you know the base is properly developed.

Step 3: Blend Until Silky Smooth

Remove the pot from heat and discard the Bay Leaf. Using an immersion blender, purée the soup until completely smooth. I like to blend it right in the pot to avoid transferring hot liquid. If you don’t have an immersion blender, carefully ladle the soup into a regular blender in batches, filling it no more than halfway each time.

Real talk: this blending step is what transforms good soup into great soup. The texture should be velvety with no chunks remaining. Return the puréed soup to the pot if you used a regular blender.

Step 4: Finish with Cream and Basil

Stir in the 1 cup Heavy Cream and 2 tbsp Unsalted Butter over low heat until the butter melts completely and the soup warms through, about 3-4 minutes. Don’t let it boil—you want to preserve that creamy texture.

Remove from heat and stir in the 1 cup Fresh Basil Leaves. The heat from the soup will wilt the basil beautifully while preserving its bright green color and fresh flavor. Taste and adjust seasoning if needed, though with the quality of San Marzano tomatoes, it usually needs little adjustment.

Health Benefits of This Recipe

Lycopene Powerhouse

The San Marzano tomatoes in this dish are packed with lycopene, a powerful antioxidant linked to reduced risk of heart disease and certain cancers. Cooking tomatoes actually increases lycopene bioavailability—so this soup delivers more nutritional punch than raw tomatoes. I always feel good serving this to my family. 💪

Rich in Vitamins

One bowl provides a significant dose of vitamin C (about 30% of your daily needs) from the tomatoes and vitamin A from the fresh basil. The heavy cream contributes vitamin D and calcium for bone health. It’s a nutrient-dense comfort food.

Herbal Health Boost

The fresh basil isn’t just for flavor—it contains eugenol, a compound with anti-inflammatory properties. Combined with the garlic’s allicin, which supports immune function, this soup does more than warm your belly. I notice I feel particularly nourished after eating it.

Low-Calorie Comfort

Despite its creamy texture, a serving contains only about 250-300 calories when made as written. The vegetable stock base keeps it lighter than many cream soups. It’s satisfying without being heavy—a perfect balance for comfort food.

Hydration Helper

With its high water content from tomatoes and stock, this soup contributes to your daily fluid intake. The electrolytes from the vegetable stock make it especially comforting during cold and flu season. I always make extra when someone in my Boston apartment needs a pick-me-up. 🌿

Frequently Asked Questions