Once the cream cheese is softened, add the granulated sugar and vanilla extract, mixing with a silicone spatula to combine. The mixture will be thick.

Mix in the milk and heavy cream a little bit at a time, stirring until fully combined. At this point, the sugar should be fully dissolved.

Pour the mixture into an empty Creami pint. Place the storage lid on the pint and freeze it on a level surface for 24 hours.

After freezing, remove the pint from the freezer and remove the lid. Put the opened pint into the outer bowl of the Ninja Creami machine, install the Creamerizer Paddle to the lid, and lock the lid assembly to the bowl. Slide the bowl assembly into the machine's motor base, twist it to the right to lock it into place, and select the Ice Cream button.

After processing is complete, unlock and remove the bowl assembly from the ice cream maker and remove the lid. Re-spin if needed until you reach a creamy consistency.

With the silicone spatula or a spoon, create a small tunnel in the center of the ice cream to the bottom of the pint. Add the halved Oreos to the hole. Reassemble the bowl and process using the Mix-In program.

Serve immediately.