Place the milk and sugar in a food blender and blend for about 2 minutes, or until the sugar is dissolved. You can also use an electric mixer or a whisk.
In a separate bowl whisk together the heavy cream and the pure vanilla extract.
Pour the heavy cream mixture into the milk/sugar mixture and blend for another minute.
Stir in the cake mix and make sure there are no lumps.
Turn on the ice cream maker, pour in the milk mixture and freeze it according to the manufacturer's instructions.
About 4 to 5 minutes before the ice cream is done churning, add the sprinkles into the mixture through the ingredient spout on the ice cream maker.
Once the ice cream is done churning, transfer it to an airtight container.
Cover the ice cream with a lid and freeze for several hours or overnight.
Notes
* To heat treat the cake mix, spread it out on a baking sheet lined with parchment paper and bake at 300°F for 10 minutes. Allow the cake mix to cool completely before adding it to the ice cream batter.