Spaghetti sauces are actually one of the easiest and simplest sauces to prepare. If you happen to be a busy person and you want to keep your food precooked for future consumption, spaghetti sauce is actually among many foods you may keep in your freezer for quite some time. As per recommendation of Food Safety & Inspection of USDA , frozen foods such as sauces or spaghetti sauces must be consumed within 2 to 4 months from the date it was placed in the fridge. For added safety and quality, make sure that you have a sealed container to avoid air passage in your food. It is also advisable to have them labeled with dates when you initially placed them in the freezer. Upon consumption, once the spaghetti sauce is thawed, make sure that you reheat and consume it right away for best quality.