In a medium pot on low/medium heat add the Nutella, milk, cream and sugar, stir with a wooden spoon, as soon as the mix starts to boil remove from heat and let cool completely, stirring often.
Then add the vodka and stir to combine.
Pour into bottles and refrigerate 2-3 days before serving. Enjoy!
Notes
How to store the Nutella Liqueur
Any cream Liqueur should be stored in the refrigerator in an airtight bottle or container. It will last up to 2 weeks. Shake well before serving. If you love really cold liqueurs, you can also store the bottle in the freezer, make sure the bottle is freezer safe.