I knew all along that when I made banana splits, I would use fresh fruit and keep the sauces as simple as possible. I have enjoyed the syrupy sauces I've eaten at the ice cream shops, but it is summer! Let us eat fresh fruit.
Combine cream, syrup, brown sugar, cocoa, salt, and half of the chopped chocolate in a medium saucepan. Bring to a boil over medium heat. Reduce heat to low, until the chocolate is barely simmering. Cook for 5 minutes, stirring occasionally.
Remove from heat and stir in the remaining chopped chocolate, butter, and vanilla. Stir until smooth. Let cool for 20 to 30 minutes before serving.
