must cake, via cato the elder, junilla tacita, and apicius

In our current read, Venus in Copper, Falco, Helena Justina, and the Senator enjoy the must cake Falco bought from a street vendor.

Must cake is known to us via Cato the Elder's On Agriculture, specifically #121:

Recipe for must cake: Moisten 1 modius of wheat flour with must; add anise, cummin, 2 pounds of lard, 1 pound of cheese, and the bark of a laurel twig.  When you have made them into cakes, put bay leaves under them, and bake.

Junilla Tacita, Falco's mother, has different ideas:

Cato’s must cake?  It’s cheap scoff for slaves. What would he  know …  Stand aside.  Now don’t fluster me … Grind your spices first.  Some cumin seeds.  I’m also using these anise stars, which are supposed to have a good flavour;  my daughter-in-law bought them for me, so I have to use them up.  They don’t grind easily.  Some trouble-maker is bound to ask “what are these hard bits with the funny taste?”  Read all in a Lindsey Davis Saturnalia Newsletter. *

And the modern day recipe:   Saturnalia Must Cake

Apicius (Wikipedia, handle with care) has mustacei which is translated into "must roles." (From Antique Roman Dishes - Collection)

But what is "must"?  It seems to be a wine sediment from the fermentation process.  It was just today discussed on the Yahoo! Apicius Group. The writer, a winemaker, says that there are two kinds of "must":  "marca," which comprises skins, seeds and stalk and which sits on top of the fermenting wine during the short primary fermentation period during late autumn;  and "lees," as a very fine and silty grape product, deposited during secondary fermentation and during aging as a sediment.  He thinks it 's the "lees" sediment that was used in the must cakes.

* Saturnalia / my review