01 -
Line a large baking sheet with parchment or wax paper and set it near your mixing bowl.
02 -
Add the butterscotch chips, peanut butter, and shortening to a large microwave-safe bowl. Microwave in 30-second bursts, stirring well after each burst, until smooth and glossy.
03 -
Add the chow mein noodles and peanuts to the warm coating. Fold gently with a spatula until the noodles are evenly coated without crushing them.
04 -
Drop heaping tablespoons of the mixture onto the prepared tray. Shape any loose pieces back into small mounds while the coating is warm.
05 -
Let the haystacks stand at room temperature for 25-30 minutes, or refrigerate for 10-15 minutes, until firm. Store airtight with parchment between layers.