In the Ninja Creami pint, using a hand frother, mix together the milk, pumpkin puree, stevia, protein powder, pumpkin pie spice and pudding mix until fully combined.
Cover and freeze for at least 24 hours.
Place the frozen pint container in the Ninja Creami and set to Lite Ice Cream. If it is powdery, add a splash of oat milk and set to Re-Spin.
Make a hole in the center and place the graham crackers in it. Set the Ninja Creami to Mix-Ins.