In a large bowl, combine yolks, sugar and coconut milks and whisk to combine.
Transfer to a medium pot and cook over medium heat, stirring constantly, until just thickened and mixture coats the back of a spoon, 8 to 10 minutes. Be sure not to let the mixture boil. Remove pot from the heat and stir in vanilla.
Transfer contents of pot to a bowl and chill until cold. Process mixture in an ice cream maker according to manufacturer's instructions then transfer to a container with a lid and freeze until firm, about 2 hours more.
Per Serving:200 calories (130 from fat), 14g total fat, 11g saturated fat, 100mg cholesterol, 20mg sodium, 16g carbohydrates, 1g protein.
Note: We've provided special diet and nutritional information for educational purposes. But remember — we're cooks, not doctors! You should follow the advice of your health-care provider. And since product formulations change, check product labels for the most recent ingredient information. See our Terms of Service.