Preheat oven to 325 F. Butter and dust cookie sheet with flour.
Place whites in the bowl of an electric mixer and whip to soft peaks. Add sugar steadily and beat 2 minutes. Stop machine and add flour, vanilla, amaretto and cocoa powder. Mix 1 minute and stop machine. Stir in nuts quickly and place 2-inch blobs on cookie sheet. Bake 30 minutes until crisp. Remove and allow to cool.
Recipe Courtesy of Mario Batali