How long should spaghetti sauce cool before putting in fridge?

The faster you cool food the better. It is best to use an ice bath to cool food quickly for freezing or refrigerating. An ice bath is: Put the food to cool in a shallow pan and put that into a bigger pan with ice and water. The ice and water level should go a little over half of the food pan. Stir the food a few times while it cools. This should take just a few minutes. Place the food after cooling in an airtight container to freeze or refrigerate.