Lou Malnati’s Sauce Recipe: Authentic Chicago-Style Tomato Blend

This sauce captures the bold, tangy essence of Chicago’s most famous deep-dish pizza.

With a simple blend of tomatoes, herbs, and just the right touch of sweetness, this authentic recipe delivers the same rich, concentrated flavor you’d expect from the original.

Ingredients for Lou Malnati’s Sauce

Ten ingredients deliver that signature Chicago deep-dish tang with authentic Italian flair.

The tomatoes are non-negotiable—San Marzano is the gold standard for authentic flavor. Look for the DOP certification on the can if you want the real deal. Most Italian markets or Whole Foods carry them, but any high-quality canned tomato works in a pinch. The oregano and basil should be dried (fresh changes the flavor profile entirely). I source mine from Penzeys for consistent quality.

Need to swap? Regular tomato sauce at a 1:1 ratio can replace the whole tomatoes if you blend it first. No San Marzano? Any whole peeled tomato brand works, but the flavor won’t be as sweet. The sugar can be omitted if you prefer a more tart sauce, or try honey at half the amount. Olive oil can be any neutral oil, but the fruity notes of extra-virgin really complement the tomatoes.

This sauce keeps beautifully—1 week in the fridge in an airtight container. For longer storage, freeze in 1-cup portions for up to 6 months. The flavor actually deepens after a day or two, making it perfect for meal prep.

Step-by-Step Instructions for Authentic Chicago-Style Tomato Sauce

This method delivers the authentic deep flavor and thick consistency of the original.

Step 1: Sauté Aromatics in Extra-Virgin Olive Oil

Heat the 0.25 cup Extra-Virgin Olive Oil in a heavy-bottomed saucepan over medium-low heat. Add the finely diced Yellow Onion and cook for 8-10 minutes, stirring occasionally, until softened and translucent but not browned.

Add the minced Garlic Cloves and cook for an additional 1-2 minutes until fragrant. Watch carefully—garlic burns easily and bitter notes will compromise the sauce. The onion should be sweet and aromatic, forming the flavor base for the tomato blend.

Step 2: Incorporate Tomato Paste and Herbs

Stir in the 2 tbsp Tomato Paste and cook for 2-3 minutes, stirring constantly. This step deepens the tomato flavor and removes any raw taste. The paste should darken slightly and begin to caramelize at the edges.

Add the 1 tbsp Dried Oregano and 1 tbsp Dried Basil, crushing the basil between your fingers as you sprinkle it in to release its essential oils. Stir to combine, allowing the herbs to bloom in the warm oil for 30 seconds before proceeding.

Step 3: Add San Marzano Tomatoes and Simmer

Pour in the 28 oz San Marzano Whole Peeled Tomatoes, crushing them by hand as you add them to the pot. This breaks down the tomatoes while preserving some texture. Add the 2 tsp Granulated Sugar, 1.5 tsp Kosher Salt, and 1 tsp Freshly Ground Black Pepper.

Stir well to combine all ingredients. Increase the heat to medium-high and bring the sauce to a gentle simmer. Once simmering, reduce the heat to low and let it cook uncovered for 45-60 minutes, stirring occasionally.

Step 4: Reduce to Desired Consistency

As the sauce simmers, it will thicken naturally. After 30 minutes, begin checking the consistency. For an authentic Lou Malnati’s-style sauce, you want it thick enough to coat the back of a spoon but still pourable.

If the sauce reduces too quickly or becomes too thick before the flavor fully develops, add ¼ cup water and continue simmering. Taste and adjust seasoning if needed, though the initial measurements should yield a perfectly balanced sauce.

Remove from heat when the sauce has reached your desired thickness and the flavors have melded into a rich, cohesive blend. The tomatoes should have broken down completely, and the oil should have emulsified into the sauce for a velvety finish.

Essential Equipment for Great lou malnatis sauce

Heavy Saucepan

I always reach for my 3-quart All-Clad saucepan for this recipe. Its heavy bottom prevents hot spots that can scorch the onions or garlic. A good saucepan should have a thick base—copper-core or tri-ply construction works best for even heat distribution. 🔥

Wooden Spoon

A sturdy wooden spoon is essential for stirring without scratching your pan. I prefer one with a flat edge for scraping up browned bits from the bottom. Avoid metal utensils with non-stick pans to preserve the coating.

Immersion Blender

For a smoother sauce, an immersion blender lets you purée right in the pot. I use my KitchenAid model for 20-30 seconds to break down any remaining tomato chunks. This creates that signature velvety texture.

Fine-Mesh Strainer

If you prefer a seedless sauce, press the tomatoes through a fine-mesh strainer before adding to the pot. This removes seeds and excess liquid while keeping the rich pulp. I use my OXO strainer—it fits perfectly over my saucepan.

Glass Jars for Storage

Once cooled, I transfer the sauce to 16-ounce mason jars for storage. The wide mouth makes filling and serving easy. For freezing, I leave 1 inch of headspace to allow for expansion as the sauce freezes. ❄️

Kitchen Scale

A digital kitchen scale ensures precise measurements, especially for ingredients like tomato paste. I use my Escali Primo to weigh out 2 tbsp exactly. Consistency in measurements leads to consistent results every time.

Frequently Asked Questions