How to Make Tomato Sauce with Tomato Paste

Turning tomato paste into a smooth, balanced tomato sauce takes just a few minutes and a handful of pantry staples. If you need to know how to make tomato sauce with tomato paste quickly—without sacrificing rich, slow-simmered flavor—the method below delivers. Master the straightforward water ratio, simple seasonings, and one essential cooking technique, and you’ll have a versatile homemade sauce ready for pasta, pizza, and more.

Quick Answer: Turning Tomato Paste into Sauce

To turn tomato paste into tomato sauce, whisk one 6-ounce (170 g) can of tomato paste with 2 cups (480 ml) of warm water, then simmer with olive oil, garlic, dried herbs, and a small pinch of sugar. Cooking the paste in oil for two to three minutes before adding liquid deepens the color and tames any raw, tinny notes. The result is a medium-bodied sauce that coats a spoon and tastes like it simmered far longer than it actually did.

Ingredients and Key Ratios

The foundation of this sauce is a reliable paste-to-water ratio. Adjust it slightly depending on how you plan to use the sauce.

Tomato paste: 1 can (6 ounces / 170 g) – look for double-concentrated paste for the richest flavor.
Water: 2 cups (480 ml) for a standard sauce; 2½ to 3 cups (600–720 ml) for a thinner pizza or simmering sauce. Warm water blends more easily and reduces lumps.
Olive oil: 1½ tablespoons – enough to coat the bottom of a small saucepan.
Garlic: 1 to 2 cloves, minced, or ¼ teaspoon garlic powder as a shortcut.
Dried oregano: ½ teaspoon.
Dried basil: ½ teaspoon.
Salt: ¼ teaspoon, plus more to taste.
Sugar: ½ teaspoon – a small amount balances acidity without making the sauce sweet.
Optional: a pinch of red pepper flakes, onion powder, or a teaspoon of balsamic vinegar for brightness.

Step-by-Step Method to Make Tomato Sauce from Paste

Warm the oil and aromatics. Place a medium saucepan over low heat and add the olive oil. If using fresh garlic, stir it into the oil and cook gently for 30–60 seconds until fragrant but not browned. Burnt garlic will make the sauce bitter, so keep the heat low.
Cook the tomato paste. Add the entire can of tomato paste to the pan. Use a spatula or wooden spoon to spread it across the bottom. Increase the heat to medium-low and cook, stirring constantly, for 2 to 3 minutes. The paste will darken from bright red to a deep brick-red and smell sweet and slightly caramelized. This step removes the raw, metallic edge paste can carry straight from the can.
Whisk in the water gradually. Pour in about ½ cup (120 ml) of warm water and whisk vigorously until the paste loosens into a smooth, lump-free slurry. Slowly add the remaining water while whisking. Doing this in stages prevents lumps and helps you reach an even texture quickly.
Season and simmer. Stir in the oregano, basil, salt, sugar, and any optional seasonings. Bring the sauce to a gentle simmer over medium heat, then reduce the heat to low. Let it bubble softly, uncovered, for 10 to 15 minutes. Stir occasionally and watch for the sauce to thicken slightly and develop a glossy surface.
Taste and adjust. After simmering, check the consistency. If the sauce is too thick, whisk in a tablespoon of water at a time. If it’s too thin, simmer a few minutes longer. Taste and add more salt, herbs, or a tiny extra pinch of sugar until the flavor feels round and balanced. Remove from the heat and use immediately.

Common Mistakes to Avoid When Making Tomato Sauce

Skipping the paste-cooking step. Tomato paste straight from the can tastes flat and slightly metallic. Sautéing it in oil develops deeper flavor and removes that raw edge. Even a minute or two makes a noticeable difference.
Pouring all the water in at once. Adding liquid too fast can create stubborn lumps. Whisk in a little at first to form a smooth base, then incorporate the rest.
Using too little seasoning. Tomato paste is concentrated but mild until seasoned. Underseasoned sauce will taste one-dimensional. Be generous with dried herbs and salt, and always taste after simmering.
Overheating the garlic. Fresh garlic burns quickly and turns acrid. Cook it on low heat just until fragrant, and add it before the paste so the oil gets infused gently.
Adding too much sugar. A small pinch balances acidity; more than ½ to ¾ teaspoon for one can of paste can make the sauce taste oddly sweet. Start small and add gradually if needed.
Simmering covered the entire time. A little evaporation helps concentrate flavor and thicken the sauce. Simmer uncovered, and only partially cover if it starts to spatter.

Storage and Serving Suggestions

Cool the finished sauce to room temperature, then transfer it to an airtight container. It keeps in the refrigerator for up to 5 days and freezes well for up to 3 months. When freezing, leave a little headspace for expansion.