I'm pretty certain I remember seeing it on a price list when most BBC and Elk games had to be mail ordered (I think Impact was the mail order company - they also produced games like Zenon and Clogger).

The answer appears on the fifty-eighth page of the book.

Stud the cake all over with chocolate chips, pointed ends in.

Her petulant sister and the logy Luella never dreamed that Aunt Crete desired such unauntly indulgences.