In a large bowl, cream butter, shortening and sugars until light and fluffy. Dissolve coffee in water; add to creamed mixture with egg and melted chocolate until blended. Combine the flour, cinnamon and salt; gradually add to creamed mixture and mix well (dough will be sticky). Shape into two 6-1/2-in. rolls; wrap each in plastic. Refrigerate for 4 hours or until firm.
Unwrap and cut into 1/4-in. slices. Place 2 in. apart on ungreased baking sheets. Bake at 350° for 10-12 minutes or until firm. Remove to wire racks to cool completely.
In a microwave, melt chocolate chips and shortening; stir until smooth. Dip each cookie halfway in chocolate; allow excess to drip off. Place on waxed paper; let stand until set.