Combine all ingredients together in a medium saucepan over medium heat.
Heat, whisking frequently, until the peanut butter chips melt and all of the ingredients come together in a smooth sauce. It will be very thin at first.
As the sauce cools to room temperature, it will thicken up. If it gets too thick, simply return it to the heat and whisk until it loosens up. To store, pour it into a bowl or airtight container and press a layer of plastic wrap on top. Keep the peanut butter sauce in the refrigerator.
To reheat after chilling, gently microwave it in 20-second increments until warm and flowing.
MEASURING TIPS
Our recipes are developed using weight measurements, and we highly recommend using a kitchen scale for baking whenever possible. However, if you prefer to use cups, volume measurements are provided as well. PLEASE NOTE: the adage “8 oz = 1 cup” is NOT true when speaking about weight, so don’t be concerned if the measurements don’t fit this formula.