Dunno about grappa, but vinars is distilled wine which is either consumed directly or used to make cognac by aging it in oak casks or with oak splinters and may

Dunno about grappa, but vinars is distilled wine which is either consumed directly or used to make cognac by aging it in oak casks or with oak splinters and maybe adding some additional ingredients such as vanilla, black tea or Sambucus flower infusion. It really depends on the producer and the recipe, but home made cognac is made like that. Each producer obviously has their own recipe. The best I've had was just aged in an oak barrel for 15y. It had a mild amberish colour. The ones made with splinters or wood residue have a too pronounced oak taste.