The general idea is to make a soft, syrup-filled candy that is primarily based on a distilled spirit. The process takes a full day, and the end product doesn't have much shelf life, so it would be keen for a party, for example. I would probably lean towards a more flavorful spirit such as bourbon, but that might be a bit strong for some guests. If you read through to the comments, there is a, um, energetic discussion (mustn't say 'spirited') about different spirits to use, possible ways to increase durability and shelf life, and how to measure.
chadzilla: making vodka pills in 24 hours: "Recently, Chef Fabian was experimenting further with the Adria/Torreblanca technique of making 'vodka pills.' I use this word to describe the process of making liquid-filled candies by pouring flavored alcohol syrups into cornstarch and letting it set until a hard outer shell forms. The process is simple, but requires great attention to certain details and a clean approach."