Marrowfat peas "medullare"). The word was coined around 1730 from "marrow" and "fat". Another source says the peas were named because people wanted plump ("fat") peas of the "Maro" variety, a Japanese variety introduced to England 100 years ago. Marrowfat peas Marrowfat peas are green mature peas that have been allowed to dry out naturally in the field, rather than be harvested whilst still young like the normal garden pea. They are used to make mushy peas, and also the snack food wasabi peas. Marrowfat peas with a good green color are exported from England to the Middle East and Japan for
Mushy peas popular in Scotland served with fish and chips or as a wetter version with vinegar in a bowl. A variant (particularly popular around Bolton, Bury, and Preston, Lancashire) is "parched peas" – carlin peas (also known as maple peas, or black peas) soaked and then boiled slowly for a long time; these peas are traditionally served with vinegar. Mushy peas have occasionally been referred to as "Yorkshire caviar". Green colouring is often used to colour mushy peas. It is typically achieved by adding the yellow and blue additives, Tartrazine (E102) and Brilliant Blue FCF (E133), which together produce the green