"Iceing" on a cake (pre-1740)

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Author: <A HREF="http://scripts.library.upenn.edu/cgi-bin/Pwebrecon.cgi?SC=Author&SEQ=20030416033521&PID=18756&SA=Petre,+D.">Petre, D.</A>
Title:  Recipe book : manuscript, 1705.
Description:    Archival/Manuscript Material
1 v. (106 leaves) : paper ; 18 cm.
URL:
http://dewey.library.upenn.edu/sceti/codex/public/PageLevel/index.cfm?WorkID=4

3
Web Link:   <A HREF="http://dewey.library.upenn.edu/sceti/codex/public/PageLevel/index.cfm?WorkID=43">Facsimile</A>
Location:   Rare Book & Ms Library Manuscripts
Call Number:    Ms. Codex 624


    Author: <A HREF="http://scripts.library.upenn.edu/cgi-bin/Pwebrecon.cgi?SC=Author&SEQ=20030416033949&PID=18807&SA=Kidder,+E.+(Edward),+1665+or+6-1739.">Kidder, E. (Edward), 1665 or 6-1739. </A>
Title:  Receipts of Pastry and Cookery for the Use of his Scholars :
manuscript, [17--] / by Ed. Kidder.
Description:    Archival/Manuscript Material
1 v. (37 leaves) : paper ; 19 cm.
URL:
http://dewey.library.upenn.edu/sceti/codex/public/PageLevel/index.cfm?WorkID=4

4
Web Link:   <A HREF="http://dewey.library.upenn.edu/sceti/codex/public/PageLevel/index.cfm?WorkID=44">Facsimile</A>
Location:   Rare Book & Ms Library Manuscripts
Call Number:    Ms. Codex 625


   I asked the Rare Book Room of the University of Pennsylvania's Van Pelt
Library about Philadelphia history digitization projects, but there's not
much going on.  Certainly, no newspapers are coming online, such as the NEW
YORK TIMES or BROOKLYN EAGLE for New York City.
   The above two cookbooks are online right now.  Check them out.
   OED has 1769 for "icing".  Merriam-Webster has "circa 1740" for "icing."
   "Iceing" is in the Kidder book, on page 23 or 24.