Fortyfold Potatoes This page first published: Apr 6, 2005 · Updated: May 12, 2018 · by CooksInfo. Copyright © 2021 · This web site may contain affiliate links · This web site generates income via ads · Information on this site is copyrighted. Taking whole pages for your website is theft and will be DCMA'd. See re-use information. Fortyfold are oval potatoes, with off-white flesh and a bluish tinge to their skins. These are waxy potatoes, with good flavour. History Notes Fortyfold Potatoes were developed in the UK in 1836.