Can you add flour to the tomato sauce thicken it?

You can add flour to tomato sauce to thicken it, but it's not the best method. Here's why:

Pros:

* Easy: Flour is readily available and easy to use.

* Quick: Flour thickens sauce relatively quickly.

Cons:

* Can make the sauce cloudy: Flour can leave a slightly pasty texture and make the sauce appear cloudy.

* Can taste starchy: If not used correctly, flour can give the sauce a slightly starchy or doughy taste.

* Can form lumps: If not properly incorporated, flour can form lumps in the sauce.

Better Options:

* Tomato paste: A small amount of tomato paste can add a rich flavor and thicken the sauce naturally.

* Cornstarch: Cornstarch is a more effective thickening agent than flour and can produce a smoother, clearer sauce.

* Butter and flour roux: For a richer flavor, you can make a roux (a mixture of butter and flour) and whisk it into the sauce.

* Reduce the sauce: Simmering the sauce uncovered for a longer time will evaporate some of the liquid, naturally thickening it.

Tips for using flour:

* Use a small amount: Start with a tablespoon of flour and add more if needed.

* Mix the flour with cold water: Create a slurry by mixing the flour with a little cold water. This will prevent lumps from forming.

* Whisk the slurry into the sauce: Gradually whisk the slurry into the simmering sauce.

* Cook the sauce for a few minutes: This will allow the flour to fully thicken the sauce.

If you're looking for a simple, quick thickening method, flour can work in a pinch. However, for a smoother, tastier result, try using one of the other methods listed above.