Does Chocolate Expire? - Tasting Table
Briefly

Chocolate does expire, and depending on the type and form, it can have an unexpectedly short shelf life, challenging the belief that it's non-perishable.
In general, dark chocolate lasts longer than milk and white chocolate due to its ingredients and lower moisture content, leading to a more extended shelf life.
Warning signs of spoilage in chocolate include white spots or sugar bloom, rancid smells, sour tastes, and mold, signaling that it is no longer safe to eat.
Most varieties of chocolate should be stored in a cool, dry place and never in the fridge, as moisture there can lead to sugar bloom.
Read at Tasting Table
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