Will Custard Go Bad

2 Answers. Since it is a custard, you should probably refrigerate it as soon as it is cool. A very sugary or acidic custard may be able to resist bacteria for a couple days (see Bismark donuts), but unless the recipe was specifically developed to be stable at room temperature, then there is some risk of it going bad.

How long does carton custard last?

To store: Store cans or cartons of custard in a cool, dry place for up to 1 year.

How long does carton custard last once opened?

Store in a cool, dry place. Once opened keep refrigerated and consume within 3 days.

Maya Lin-Takahashi

Maya Lin-Takahashi

Consumer Tech & Gadget Reviewer

Maya is a hardware enthusiast who tests and reviews smart home devices, smartphones, wearables, and audio gear. She focuses on practical consumer value and build quality.

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