Line a 8x8 squared baking tin with baking paper. Switch slow cooker onto a low setting.
Break up chocolate into small pieces
Add all the ingrediants into the slow cooker / crockpot
Leave the lid off the slow cooker and stir regularly until chocolate is melted and continue to stir every 15 minutes
After 2 hours, pour fudge mixture into prepared tin and level out.
Add 16 rolos on top of the fudge mixtire and drizzle with caramel sauce
Chill the mixture for 2 hours
Keep at room temperature in an airtight container and consume as soon as possible. The fudge will last for over a week in the container. The fudge can also be frozen in 2 layers of clingfilm or baking paper in a freezable container for up to 3 months.