Slice vanilla bean lengthwise and scrape out the seeds. Place vanilla pod and seeds in hot coffee and let steep while you get everything else ready.
Place all ingredients in blender and blend until sugar dissolves, about one minute. Chill thoroughly. Pour into ice cream maker according to manufacturer's instructions and let run.
Notes
For best results make sure all ingredients are very cold before churning the ice cream.
Substitutions
The golden syrup is to give the ice cream a silkier feel. Use table sugar instead if desired.
Instead of a vanilla pod you can use vanilla extract.
Corn Substitutions: Corn is a common ingredient in products. Starch, modified food starch, dextrin and maltodextrin can be from corn. Consult with your physician to find out which corn derivatives you need to avoid. Many corn-free options are available in the US. Find out more about corn substitutions.
Milk and Soy Substitutions: Alternative dairy-free milk beverages and products will work in most recipes. Find out more about milk substitutions and soy substitutions.