Cream the cream cheese, sugar and vanilla essence at medium speed (not high!) until the paste is smooth (Thermomix #1, 4 minutes)
Add the sour cream and mix till smooth. (Thermomix #2, 30 seconds)
Add the eggs one at a time, do not overbeat at this time. (Thermomox #2, 2 minutes)
Beat in the cream. (Thermomix #2, 30seconds)
Pour the cream cheese mixture into the same mold used to bake the sugar base. Remember to oil the cake tin well.
Put the cake into a baine marie with water covering beyond the middle of the cake tin.
Bake for 180C on the lowest shelf possible for 11/2 hours.
When done, remove cake from the bain marie, and keep the door ajar until cake is cooled.
Transfer the cake to the refrigerator.