Here’s a fun fact: pH levels matter. Applesauce is naturally acidic (pH around 3.5), which fights off bacteria. But it’s not invincible.
Once you open the jar, airborne yeast and mold spores start a rave in there. They love the sugar. They’re party animals.
Your fridge slows the rave down, but it can’t stop the music forever.
How Long Does Homemade Applesauce Last In Refrigerator | Detroit Chinatown
Can You Can It?
If you properly water-bath can your applesauce, it can last years on a shelf. Yes, years. That’s practically a historical artifact.
But if you’re not a canning expert? Stick to the fridge or freezer. Botulism is not a funny party trick.