Combine the Vanilla Premier Protein shake, pudding mix, and toffee extract in the Ninja Creami pint container. Stir well to combine.
Freeze the pint container on a flat, level surface for 24 hours or until frozen solid.
When ready to serve, run the frozen pint under hot water for 30 seconds to loosen the sides. Remove the lid and place the container into the outer bowl of the Ninja Creami.
Secure the outer bowl lid, insert it into the Ninja Creami machine, and press the Lite Ice Cream button. Let the cycle complete.
Check the texture; if powdery, use the Re-spin function for a much creamier texture.
Create a hole in the center of the ice cream and add the crushed pretzels and toffee bits. Use the Mix-In button to evenly distribute them throughout the entire pint.
Top with caramel sauce and enjoy!