We'll have to call this a tie as we are both right. It is made with cognac which is a type of brandy. All cognac is brandy but not all brandy is cognac.
cognac
\Co"gnac`\, n. [F.] A kind of French brandy, so called from the town of Cognac.
Source: Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
cognac
n : high quality grape brandy distilled in the Cognac district of France [syn: Cognac]
Source: WordNet ® 2.0, © 2003 Princeton University