What is the Easiest Way to Thicken Runny Spaghetti Sauce?
In my opinion, adding a cornstarch slurry is the quickest and easiest way to thicken spaghetti sauce as the starch in the cornstarch binds to the moisture in the sauce. Though, be sure to mix the cornstarch with water to make a slurry prior to adding to the sauce. I would then add small amounts at a time until you get the texture right.