In a microwave safe dish, combine caramel and milk. Cook on high until milk starts to bubble, about 15 seconds. Remove and stir until caramel is melted and smooth. Set aside to cool to room temperature.
Add caramel mixture and ice cream to Blender Jar. Blend until smooth. Add cashews and pulse until cashews are evenly distributed throughout the shake but not smooth.
Twister Jar Directions
Add caramel mixture and ice cream to Twister Jar; push ice cream down to blade and place Twister Lid on jar.
Hold Twister Lid and with the other hand press "Speed Up", turn Twister Lid counter-clockwise during blending and run until nearly smooth. Press "Pulse" to stop blender.
Add cashews. Replace lid and press "Pulse" until cashews are evenly distributed throughout the shake but not smooth.