Place the Cuisinart Fondue Pot on setting 4 ½. Add the heavy cream and bring to a simmer.
Once the cream starts to simmer, lower heat to setting 4 and add half of the chocolate pieces. Stir with a rubber spatula until smooth and creamy.
Repeat with the remaining chocolate. Add the peanut butter and stir constantly until incorporated.
Reduce the temperature to Setting 3 to serve the fondue immediately with your favorite dippers.
Place 1 cup of water in a medium saucepan and bring it to a simmer over medium-low heat. Place a medium bowl over the simmering water and add the chocolate and cream. Let the mixture sit for a minute, and then stir constantly until completely melted about 5-10 minutes. ***Be careful to not let the steam from the simmering water get into your chocolate mixture, this will undoubtedly seize the chocolate. If a lot of steam is escaping, lower the temperature.***
Once the chocolate is melted, add the peanut butter and stir until incorporated. Pour into a bowl and serve immediately with your favorite dippers.