Maybe you guys have this info memorized, but I rounded up some
stuff about chocolate substitution and thought I'd share. If
I'm wrong, be sure to point it out:

Subsitutes for Unsweetened chocolate (aka bitter chocolate, baking
chocolate, pure chocolate)

Using Cocoa:

1 oz. unsweetened chocolate equals 3 T. unsweetened cocoa plus 1 T.
unsalted butter, margarine, shortening or vegetable oil.

Using Semi-sweet chocolate:

1 oz. unsweetened chocolate plus 1 T. sugar equals 1 oz. semi-sweet
chocolate.

--
Jani in WA