Place the cream cheese in a microwave-safe bowl and microwave for 10 seconds.
Add the granulated sugar and vanilla extract to the softened cream cheese. Mix thoroughly with a silicone spatula or wooden spoon until you form a thick paste.
In a separate measuring cup, combine the whole milk and heavy cream. Gradually add this liquid to the cream cheese mixture, a few tablespoons at a time, stirring well to incorporate. Continue until all the liquid is added and the sugar has completely dissolved.
Pour the mixture into a Ninja Creami pint, seal the lid, and freeze it for 24 hours in a flat position in your freezer.
After 24 hours, remove the pint from the freezer and take off the lid. Place the pint into the Ninja Creami bowl and secure the lid.
Insert the bowl into the machine and lock it into place.
Select the Ice Cream function, which will run for about 2 minutes.
Once the process is complete, unlock the bowl, remove the lid, and serve your homemade ice cream. Enjoy!