Recipe from: The Story of Pure Vanilla, rewritten by R.C. Schlotterer.
Published by the Vanilla Bean Association of America, © 1955.
Cream butter, powdered sugar, cocoa and salt with mixer. Add egg yolks. Beat until smooth. Beat
whites very stiff and add vanilla. Add to original mixture and beat until perfectly smooth and light
(5-10 minutes). Add nuts. Line an 8 x 12 inch pan with waxed paper. Sprinkle bottom with
vanilla wafer crumbs. Pour in mixture and sprinkle top with wafer crumbs. Let stand several hours
before serving (may be made several days in advance, if desired). Cut in squares and serve topped
with whipped cream.