We used regular creamy peanut butter. Natural peanut butter tends to be runnier and may affect the final result.
We recommend using a good quality cocoa powder for a darker, more flavourful result.
You can also roll out the peanut butter mixture between two sheets of parchment paper to the same thickness.
The fudge sauce will keep for 1 week in an airtight container in the refrigerator. You can gently reheat the sauce in a small pot or in the microwave oven when ready to serve.