I agree with everyone's posts above about toasting unsweetened coconut to the secondary. However, just throwing it out there, you can also use coconut extract. I did a coconut porter last summer and did 1lb of unsweetened toasted coconut as well as one of those pure coconut extract bottles from whole foods (2oz maybe....can't remember size now but it was super small). It added a pretty good coconut punch to the porter. At first, it was slightly medicinal tasting, but after about 2 weeks in the keg, that flavor faded and it was just a punch of coconut and it was awesome! Everyone that had it loved it. So, just an alternative to doing straight toasted coconut.