Preheat oven to 350 degrees Fahrenheit. Line and amply grease two or three baking sheets.

Beat egg whites until foamy. Sift sugar, cocoa, flour, and coffee into egg whites. Add water and beat mixture on low speed to blend.

Then beat on high speed for a few minutes until mixture thickens. Fold in walnuts

Place spoonfuls of mixture on cookie sheets, one inch apart.

Bake for 12 to 15 minutes or until firm and cracked on top, but soft inside. Do not over-bake.