You'll also find this recipe on page 120 of the Creative Bakes Cookbook.
The sweeteners used in the Werthers' are isomalt and acesulphame-K. These are low carb due to their low GI, but they're not clean keto. The carbs listed on the Werthers packet are mainly from polyols, so have not been counted when tracking the macros.
In the photo, we served this with the no-churn vanilla ice cream.
For the whole recipe:
352 Calories / 1.3g Carbs / 1.3g Protein / 38.1g Fat
This recipe makes 4 portions - each one contains:
88 Calories / 0.3g Carbs / 0.3g Protein / 9.5g Fat
80g Fresh Double Cream
6 Sugar Free Werthers Original (the hard boiled ones, not the chewy ones)
Put cream and butterscotch sweets into a nonstick saucepan.
Gently melt, whilst stirring constantly. This will thicken into a glossy thick sauce (this takes about 5 minutes)