Marfona Potatoes This page first published: Dec 26, 2004 · Updated: May 12, 2018 · by CooksInfo. Copyright © 2021 · This post may contain affiliate links · This blog generates income via ads · Marfona are oval potatoes with buff yellow skin and firm, smooth, light yellow flesh. In the UK, they are marketed as waxy; in North America, suppliers just market them as all-purpose. Cooking Tips Best as a boiled potato.