The article doesn't say how they add liquorice to vodka, anyway I've tried at a friend's house some vodka to which he simply put one or two liquorice roots into

The article doesn't say how they add liquorice to vodka, anyway I've tried at a friend's house some vodka to which he simply put one or two liquorice roots into the bottle before letting it sit into the freezer for some days/weeks. It tasted exquisite.