In the amount of Black Briar reserve of course. After Retaking Thrisk the meadhall is restored, the mead is placed. Im unsure if it is a random mead, but if it is, It beats BlackBriar manor by 21 bottles, therefore, the wiki must be updated. But I dont trust myself ever since I [censored] around on Wikipedia a couple years back.

http://www.uesp.net/wiki/Skyrim:Food#Beverages