Buying couverture, and what to ask for
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Ask for the specification, not the marketing
Cacao percentage, cocoa butter content, the composition that supports the standard of identity you intend to claim, and the recommended tempering curve. All of that exists as a document and a supplier who deals with professionals will have it.
Cocoa butter content decides how it flows
A couverture with more cocoa butter is thinner when melted and coats more finely, which matters for enrobing and for molded shells. Two chocolates at the same cacao percentage can behave completely differently for this reason, which catches people who switch brands on price.
Origin and certification claims are theirs
Single origin, a named region, organic or a fair trade scheme are claims about a supply chain you did not see. Repeating them on your label means you need documentation against the lot, and for certification schemes it may mean being in the scheme yourself.
Allergens travel with it
Milk in a milk or white chocolate, soy lecithin as an emulsifier in most of them, and whatever else runs on the manufacturer’s line. Their cross-contact statement becomes part of yours, and a nut-free claim on your product depends on their facility as much as on your kitchen.
Buy to your turnover
Couverture keeps well in the right conditions and it is a significant amount of cash sitting in a store room, and it does pick up smells and can bloom in a store room that swings in temperature. Buying a year ahead for a price break is the same mistake the oils property describes.
Store it away from everything aromatic
Cocoa butter takes up odors readily, so chocolate stored near spices, cleaning products or scented stock will carry them into the finished product. Cool, dry, stable and isolated is the specification.