How do you skim fat off of spaghetti sauce?

To skim fat off spaghetti sauce, allow the sauce to simmer, which will cause the fat to rise to the surface. Use a spoon or a ladle to gently skim the fat from the top. Alternatively, you can use a fat separator, a special pitcher designed to separate fat from liquids. Another method is to chill the sauce in the refrigerator, where the fat will solidify and can be easily removed.