Simmer the milk, sugar and cinnamon sticks in a pan on a low heat for around an hour, until thickened to custard-like consistency.
Allow the milk mixture to cool before stirring in the egg yolks and alcohol.
Serve straight as a Snogg shot or fashion your own snowball. The advocaat will keep for up to 3 days in the fridge.
Snogg Snowball
Combine 50ml of Snogg, 12.5ml of lime juice and 200ml of lemonade in a shaker with ice. Shake, strain into a tumbler, add ice and then garnish with lime wedge and nutmeg.