Special equipment: a fondue pot or slow cooker
In a medium pot over medium heat, add the chocolate chips, peanut butter, heavy cream, cinnamon sugar and a pinch of salt. Cook, stirring, until everything melts together. If needed, add a bit more heavy cream to loosen the mixture. Pour into a fondue pot or slow cooker and top with the chopped nuts. Serve with pretzel sticks, bananas or bacon for dipping.