A crumpled bag of baking chips in the pantry. The linen closet candy stash you forgot about. The kids’ old Halloween haul. A fun-size piece in the glove compartment. There are few things as exciting ...

Calling all chocolate lovers—this one's for you! If you've cleaned out your pantry and found a stash of old Halloween candy or half-used bag of chocolate chips, you know how thrilling and confounding ...