How to Make Spaghetti Sauce Thick: 5 Simple Tips

There’s nothing quite like a hearty, flavorful spaghetti sauce to top your pasta. But sometimes, your sauce may turn out too thin, leaving you with a watery mess. If you want to make your spaghetti sauce thick and rich, here are 5 simple tips:

1. Use Tomato Paste

Tomato paste is a thick, concentrated form of tomato puree that’s made by cooking down tomatoes until they’re reduced to a thick, paste-like consistency. Adding a small amount of tomato paste to your spaghetti sauce can help to thicken it up and give it a rich, tomato flavor.

2. Add a Starch

Another way to thicken up your spaghetti sauce is to add starch, such as flour or cornstarch. To use flour as a thickener, mix a tablespoon of flour with a little cold water to make a paste, and then stir it into the sauce. For cornstarch, mix a tablespoon of cornstarch with a little cold water, and then stir it into the sauce. Be sure to cook the sauce for a few minutes after adding the starch to allow it to thicken up.

3. Reduce the Liquid

If your spaghetti sauce is too thin, one of the easiest ways to thicken it up is to simply reduce the liquid. Simply simmer the sauce over medium-low heat, stirring occasionally, until some of the liquid has evaporated and the sauce has thickened to your desired consistency.

4. Use Pureed Vegetables

Pureed vegetables, such as carrots or bell peppers, can also help to thicken up your spaghetti sauce. Simply blend a few cooked vegetables in a blender or food processor, and then stir the puree into the sauce. The vegetables will add body and thickness to the sauce, as well as a boost of nutrients.

5. Cook Longer

Finally, sometimes all it takes to thicken up your spaghetti sauce is a little more time. As the sauce simmers, the flavors will develop and the sauce will naturally thicken up. So if you have the time, let your sauce simmer for an extra hour or two to allow it to thicken up and develop a rich, flavorful depth.


Making spaghetti sauce thick is easy with these 5 simple tips. Whether you use tomato paste, starch, reduced liquid, pureed vegetables, or a longer cooking time, you can easily thicken up your sauce and turn it into a rich, flavorful masterpiece.

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