Preheat oven to 350*F. Butter standard muffin tins. Combine unsweetened and semusweet chocolates and butter in top pan of double boiler and place over simmering water. Stir frequently until melted and smooth. Set aside to cool slightly. In small bowl stir and toss together flour, baking powder and salt; set aside. In another bowl combine the eggs, sugar, vanilla and coffee granules or powder. Beat until light and double in volume (a hand-held mixer is useful for this step). Beat in chocolate mixture and the the combined dry ingredients just until blended. Stir in chocolate chips and walnuts. The mixture will be stiff, almost like dough. Spoon into prepared muffin tins,filling each cup about two-thirds full. Using moistened fingertips smooth the top of each muffin. Bake until they look dry on top, about 15 minutes. Do not overbake, the centers should remain moist. Cool in tins for 10 minutes the remove. Makes 12 standard muffins. Posted to Bakery-Shoppe Digest by Alice Poe on Apr 08, 1998