Jane, here's the recipe I got from Christopher Ware, the bar genius at Paramour:
She might have had the Barrel Aged Cognac Old Fashioned. I took Camus VSOP and aged it for 1 year and 1 month in a 20 liter barrel. The recipe is roughly 2 oz. Choice of Spirit, 4-5 dashes Angostura, a sugar cube, ice and a orange zest if she wants to make it now and not wait a year!