Tansy (tanacetum), a herb from which puddings were made. Hence any pudding of the kind. Selden (“Table Talk”) says: “Our tansies at Easter have reference to the bitter herbs.” See in Wordsworth’s “University Life in the Eighteenth Century” recipes for “an apple tansey,” “a bean tansey,” and “a gooseberry tansey.”—M. B.
This text comes from a footnote on a diary entry in the 1893 edition edited by Henry B. Wheatley.