Combine coconut milk, coffee, and raw sugar in a small saucepan over medium heat and whisk until well combined - about 5 minutes.Remove from heat and whisk in vanilla. Transfer to a bowl to let cool completely in the fridge - at least 6 hours, overnight being preferable.Transfer to ice cream maker and prepare according to manufacturer instructions. Once done either eat immediately or transfer to a freezer-safe container and let harden for several hours. Should keep for 1 week in the freezer. Let stand for 15 minutes at room temperature before serving.