Place all ingredients in medium saucepan.
Bring to medium heat, whisking fairly often, ensuring cinnamon is fully combined.
Continue whisking and keeping at medium heat for 5-10 minutes.
Pour into glass jar, including vanilla bean, and let sit in fridge overnight.
Shake well before using, as cinnamon will settle in the fridge.
Store in airtight container in fridge for 5-7 days.
