In a microwave safe dish, add the butterscotch chips and shortening together. Heat in 15 second intervals, stirring after each interval, until melted. Stir well until glossy and smooth.
Add the chow mein noodles and cashews and gently stir well until thoroughly coated with the butterscotch.
Drop spoonfuls of the mixture onto parchment paper and allow to set up. After they have set up, store in a Tupperware at room temperature.