I found the recipe in Act 2, in connection with the quest "A Lost Lamb". This is the quest in which Vaska asks you to find the lost boy. Although you cannot find the lost boy in Act 2, you can report back to Vaska in Act 2 that you have checked the Druid's camp (as Vaska asked); but did not find the boy; and you will keep looking. When you make this report to Vaska, you will find her in her hut amidst a group of 6-8 brickmakers who seem to be praying. If you talk to each of the brickmakers, one will tell you he wishes to reward you 100 Orens for searching for the boy. If you graciously refuse the reward, he apologizes for "testing" you (with the 100 Oren reward offer), and then gives you the perfume recipe which he holds to be of a much greater value. He tells you he hopes that you will use the perfume to find a wife and settle in the Brickmaker's villiage (kind of touching in a way).I've been able to repeat this several times on different playthroughs. __