Line a large baking sheet with parchment paper or a silicone baking mat.

In a large bowl, combine butterscotch chips, chocolate chips, and peanut butter.

Heat in the microwave for 1 minute, stir and continue heating for 20-30 seconds at a time until the chocolate is almost melted.

Remove the bowl from the microwave and stir until smooth.

Stir in chow mein noodles until well coated.

Using a large cookie or ice cream scoop, work quickly to divide the mixture into mounds on the lined baking sheet.

Let the cookies set until hardened, about 1-2 hours.

Remove from the sheet and store in an airtight container until ready to serve.