The Collaborative International Dictionary of English v.0.48:

Racahout \Ra`ca`hout"\ (r[.a]`k[.a]`[=oo]"), n. [F. racahout,
   probably fr. Ar. r[=a]qaut.]
   A preparation from acorns used by the Arabs as a substitute
   for chocolate, and also as a beverage for invalids.
   [1913 Webster]