Originally Posted by VTBrewer
Some people split them and scrape the insides a little bit and throw them in, some split/scrape/soak in vodka for a day and dump that all in.
I've made a vanilla milk stout a couple times. What I did was split the beans lengthwise, dump it into a small glass jar and cover 'em with the cheapest bourbon I could buy.
Left it in the fridge for about a week. Then I dumped everything into the secondary for a couple weeks, kegged and it was great. Only wish the vanilla hadn't faded with age.