Net information mentions 'half a teaspoon'. Medline seems to indicate that an effective dose varies greatly from person to person. It is probably safe to assume this is a safe starting dose. Reports mention overdosage can result in 'coma and seizurelike activity'. The mentioned amounts which caused these problems were from .25 of a teaspoon to 4 tablespoons.
Full recovery seems to be universal.
This further goes to show that each persons reaction is very individual. It is a must-read before you experiment with the chemical. Alice understand that the author of this post's name was not actually 'Frank' and that he was an alt.psychoactives regular who finally outed himself as the actual author. If anyone know of his email address please contact Alice at the anon email address attached. Alice would appreciate hearing from anyone who has attempted any of the above, be it tasting or cooking.