Combine the Fairlife milk, almond milk, vanilla protein powder, vanilla instant pudding mix, vanilla extract, and salt in your Ninja Creami pint container. Use a handheld frother to mix everything really well until smooth.
Place the container in your freezer for 24 hours to ensure it freezes completely solid.
Once frozen, remove the pint and run it under hot water for about 60-90 seconds to slightly loosen the edges.
Install the pint into your Ninja Creami machine and select the "Lite Ice Cream" button for the first spin.
Check the ice cream's texture. If it's a bit powdery, put it back in the machine and press the "Re-Spin" button.
If it still needs to be creamier, add just a tiny splash of milk (about 1 tablespoon) and re-spin until it reaches your desired smooth, creamy perfection.
When the ice cream is silky smooth, make a small hole in the center and carefully pour in your Smarties.
Use the "Mix-In" function on your Ninja Creami to perfectly blend the colorful candies throughout. Grab a spoon and enjoy your delicious, healthy, and refreshing ice cream!