Are chocolate sour by nature?

I saw some 100% cocoa chocolate for baking. I bought a bar and found that it taste sour. It says no sugar added so I expect it not to be sweet. Without sweetener, do chocolate taste sour by nature?
Reply to
peter
To me, unsweetened cocoa is one of the worse tasting things in the world. Totally awful. But I think some people like it. For me it must be sweetened. Jackie
Reply to
Jacqueline Davidson

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