Are you tired of thin and watery homemade spaghetti sauce? Do you long for a thick and hearty sauce that clings to your pasta?

Look no further! In this article, we will explore some simple yet effective methods to thicken your homemade spaghetti sauce and take it to the next level. So, let’s dive in!

1. Simmering

Simmering is a tried-and-true method that can help thicken your spaghetti sauce.

By gently cooking the sauce over low heat for an extended period, excess moisture evaporates, resulting in a thicker consistency. Remember to stir occasionally to prevent sticking or burning.

2. Tomato Paste

If you’re looking for an instant thickening agent, tomato paste is your go-to ingredient.

Packed with concentrated tomato flavor, it adds richness and thickness to any sauce. Simply add a tablespoon or two of tomato paste to your sauce and stir well until fully incorporated.


If you find tomato paste too tangy, balance the acidity by adding a pinch of sugar or grated carrot.

3. Roux

A roux is a classic French technique used as a base for thickening sauces.

It consists of equal parts flour and fat (such as butter or oil) cooked together until golden brown. To incorporate a roux into your spaghetti sauce, follow these steps:

  • Melt 1-2 tablespoons of butter in a skillet over medium heat.
  • Add an equal amount of all-purpose flour.
  • Cook the mixture, stirring constantly until it turns golden brown.
  • Gradually whisk in some of the simmering spaghetti sauce until smooth.
  • Add this mixture back into the main saucepan and continue to simmer until thickened.


Make sure to cook the roux long enough to eliminate the raw flour taste.

4. Cornstarch Slurry

A cornstarch slurry is a quick and easy solution to thicken your spaghetti sauce. Here’s how you can use it:

  • In a small bowl, mix 1 tablespoon of cornstarch with an equal amount of cold water.
  • Add the slurry to your sauce while it’s simmering.
  • Stir well and continue cooking for a few minutes until desired thickness is achieved.


Remember that cornstarch has a higher thickening power than flour, so use it sparingly to avoid over-thickening your sauce.

5. Adding Vegetables

In addition to enhancing flavor and nutrition, adding vegetables like onions, bell peppers, or mushrooms can contribute to a thicker sauce.

These vegetables release moisture during cooking, which helps thicken the sauce naturally. Chop them finely or use a food processor for better integration into the sauce.

Final Thoughts

Thickening your homemade spaghetti sauce doesn’t have to be complicated. By incorporating these simple techniques like simmering, tomato paste, roux, cornstarch slurry, or adding vegetables, you can achieve a luscious and thick sauce that will impress even the pickiest eaters. So go ahead and elevate your pasta dish with a velvety homemade spaghetti sauce that sticks beautifully to every strand!