RECIPE FOR FABULOUS BUDINO INCLUDES THIS CHOC, BUT I HAVE NOT FOUND IT
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Can you share the recipe? That would make it easier to help you.
Diana B is a trusted home cook.
Check with http://www.eataly.com/. I notice they don't mention the percent of cacao their chocolates contain, but there's a bitter chocolate bar with hazelnuts that's likely to be what you want. You can also phone or email eataly and get more specifics.