By Anke TimmermannWer ain guot Muess wil machen [Es] kompt von siben sachen Aijr und salz Milch vnd Schmaltz gewurtz vnd Mell von Saffran wirdt es gell (ÖNB MS 11410, f. 186r, s. xvi)
[He who wants to make a good porridge needs seven items: eggs and salt, milk and suet, spice (elsewhere: sugar) and flour; saffron gives a yellow colouring.]
These rhymes will seem very familiar to anyone who grew up in a German-speaking family: unbeknownst to many, the children’s song “Backe, backe Kuchen” can be traced back as far as the fifteenth century. Perhaps understandably it is commonly accepted that this is a piece of folklore for toddlers rather than a recipe proper. Even the original recipe for porridge–or cake, in the children’s rhyme–is simple and elliptic. No measurements or methods are provided, and the phrasing and listing of exactly seven ingredients seems formulaic. But the environment that brought forth this recipe is much more complex, bringing together medieval poetry, recipes and scientific communication.
To see the connection between science and porridge we need to look at the manuscripts in which the text was originally written. The earliest documented copy of the poem can be found among jottings on the inner cover of a fifteenth-century manuscript, beside medical notes and recipes. The cited sixteenth-century version appears in a medical recipe book owned by a physician-apothecary near Vienna, Wolfgang Kappler. This pharmacological reference work contains hundreds of recipes, some of them traditional instructions for the manufacture of pills and salves, many explicitly using alchemical methods and ingredients, others covering diet and regimen, and all of them intended to be useful in his professional practice. The rhymed parts of both manuscripts are comparatively few. But beyond the confines of their covers, they form part of a medieval and early modern written tradition in which scientific verse spread across Europe. To Kappler and his contemporaries, these rhymes would not have conjured up the image of chanting children. Rather, they would have recognised the rhymes as an accepted medium of communicating knowledge.
Why would anyone choose to write a recipe in rhyme rather than in plain instructive prose? Answers to this question are many and varied. In late medieval England, for example, the hope of attracting royal funds for a future project certainly inspired some alchemical practitioners to compose couplets. Medical recipes, much less often subject to versification, might sometimes cross over into the realms of charms, cookery and general Middle English poetry. Incidentally, John Lydgate’s (author of the Fall of Princes) most popular poem during his lifetime was a medical one, his Dietary.
Scientific poems on botany, the stars and their movements joined longer learned treatises (‘encyclopaedic poetry’) on the make-up of man and God’s creation. Particularly in alchemy, rhyme served as a vehicle for preserving practical instructions, making it easier for a copyist to transport the text from one manuscript into another or for the practitioner to memorise important steps in the laboratory. With ancient didactic poetry as ancestor and current concerns about techne, craft and knowledge at its heart, scientific poetry was a working genre for those who wrote, read and used it.
When English antiquarian Elias Ashmole published Middle English alchemical poetry in his Theatrum Chemicum Britannicum he focused on the poem’s role in English language and literature, not in the laboratory. Since then the connection between poetry and science or craft has been lost. It is this discrepancy between the nature of modern scientific publications and that of their historical ancestors that makes scientific poetic recipes so intriguing and yet so difficult to research. While it may not be child’s play it tells us much about how historical experts transformed experience into knowledge as they turned prescriptions into rhyme.
 On the manuscript, see the Austrian National Library’s catalogue HANNA, s.v. 11410.
 C.M. Blaas, “Ein Kinderspruch aus dem XV. Jahrhundert” in Germania 23 (1878), 343.
 For example, see: P. J. Grund, ‘Misticall Wordes and Names Infinite’: An Edition of Humfrey Lock’s Treatise on Alchemy (2011).
 K. Bühler, “Lydgate’s Rules of Health in MS Lansdowne 699” in Medium Ævum 3 (1934), 51-6.
 On the history and functions of scientific, especially alchemical, poetry see e.g. R. M. Schuler, Alchemical Poetry, 1575-1700 (1995), D. Kahn, “Alchemical Poetry in Medieval and Early Modern Europe: A Preliminary Survey and Synthesis” in Ambix, 57-58 (2010/11), 249-74/62-77, and my forthcoming article in the Companion to Fifteenth Century Verse. Note also J. Telle’s forthcoming monograph on German alchemical poetry, Alchemie und Poesie.
 E. Ashmole, Theatrum Chemicum Britannicum (London, 1652).