Place ice cream, ice, butterscotch and cream soda in a blender. Mix just until combined. Add more ice as need to create desired consistency. Add a splash of vanilla and more butterscotch if desired.
Serve in cold glasses. You can drizzle butterscotch into the glass before pouring the drink in for a fun look. Then pour frozen butterbeer in and top with whipped cream and extra butterscotch if desired. Enjoy!
For homemade whipped cream: https://www.iheartnaptime.net/simple-homemade-whipped-cream/ - you could even add a Tablespoon of butterscotch syrup to the whipped cream for a delicious flavor.