For the butterbeer base
01 -
4 cups (960 ml) cream soda, well chilled
02 -
1/3 cup (105 g) butterscotch sauce, plus more for drizzling
03 -
1 teaspoon butter extract, optional
04 -
1/8 teaspoon fine salt
For the whipped topping
05 -
1 cup (240 ml) heavy cream, cold
06 -
2 tablespoons powdered sugar
07 -
1/2 teaspoon vanilla extract
08 -
1 tablespoon butterscotch sauce