Mix whipped cream with the milk, powdered sugar, yolks, and vanilla sugar with a mixer until well blended.
Add the alcohol and a good dash of cognac.
Bottle and shake often.
Use sterile glass containers for your homemade Advocaat
It is essential to use sterile glass containers. So before filling in the homemade Advocaat, you have to sterilize them.
How to sterilize the glass containers?
Put the jars, bottles, and lids in a pot. Fill with water so that the water covers the jars and bottles. Boil for 30 minutes until bubbling. Remove the jars, bottles, and lids one by one and place them on paper towels to dry.