Hippocras is a Westerosi alcoholic drink. It is likely made from wine mixed with sugar and spices, most notably cinnamon, and possibly heated. It was King Viserys I Targaryen’s custom to take a cup of hippocras at the hour of the bat.  Falyse Stokeworth is fond of hippocras, and according to Jaime Lannister it’s a wonder she doesn’t piss the stuff.
A Feast For Crows
|“||A man may prefer the taste of hippocras, yet if you set a tankard of ale before him, he will quaff it quick enough.||”|
Cersei utilizes the hippocras while trying to deftly convince the simple-minded Falyse and Balman to dispose of the Ser Bronn of the Blackwater. It is well past midnight before she can get rid of them. Ser Balman proved a great one for suggesting yet another flagon, and the queen did not think is prudent to refuse.
In order to secure the Faith's blessing for her son and cancel the near one million dragons the crown owed the Faith, Cersei allows the High Septon to restore the Faith Militant. Cersei and Taena Merryweather broach a flagon of hippocras and drink to the fervor of the Warrior's Sons on their way home from Cersei’s meeting with the High Sparrow. The hippocras is as sweet and savory as Cersei’s triumph.
|“||I could have hired a Faceless Man to kill Bronn for half of what I’ve spent on hippocras.||”|
|“||To the fervor of the Warrior's Sons and the brilliance of the Queen Regent. To Cersei, the First in Her Name!||”|