How long will a sauce last for when placed on freezer and in a refrigerator?

  • It depend on the sauce; what kind of sauce are you talking about? – Max Oct 17 '19 at 23:49

If it's sugary, or contains enough protein, a -20°C freezer won't stop problems. Sugar epimerization, taste change, happens down to -70°C. You find those units in labs, not homes. Generally a freezer is good against bacterial and fungal growth. But you'll still have freezer burn after a year or so.Even with freezer bags. Actual containers work better, as 5-8mil plastic is fairly water permeable.

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