So this is what Manus Christi is in that one recipe:
16. To make Manus Christi
Take halfe a pound of fine white Suger, put thereto foure ounces of Rosewater, seeth them upon a soft fire of coals, till the water be consumed and the Suger is become hard: then put therein a quarter of an ounce of the powder of Pearles, stirre them together, put for every spoonfull a piece of a leafe of gold cut of purpose, cast them upon a leafe of white paper, being first anointed with sweet Butter for cleaving to.
From:
http://www.povertystudies.org/Links/Rhwymbooks/TreasuryOfHiddenSecrets/Treasury-PartOneOnFruitsEtc.htm