One of the reasons small bean-to-bar chocolate makers don't use added cocoa butter in their recipes is because, in order to be truly single-origin, the cocoa butter should come from the same beans used to make the chocolate.
Another reason often cited is that adding deodorized cocoa butter "dilutes" the flavor of the chocolate. Undeodorized cocoa butter has a flavor so it doesn't have the problem of diluting the flavor it has the problem of altering the flavor of the chocolate. Adding undeodorized Ghana butter to a chocolate made from Madagascar beans and what's the result?
Which way to go? It's up to you as the chocolate maker to decide. If you are going to be marketing single-origin chocolates then I think you've got a problem using cocoa butter that's not from the same origin, irrespective of whether it's deodorized or un-. If you don't have that issue, then un- is the way to go.
And - BTW - here in the US, white chocolate is legally chocolate, as long as the recipe conforms to the Standard of Identity (if it doesn't you can't call it white chocolate). FYI, perhaps the best white chocolate in the world is made with undeodorized cocoa butter: El Rey's Icoa. I tad heavily roasted for taste, but it does taste like cocoa and not sweet dairy.
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