1. Cut the marshmallows in half and roughly chop the chocolate.
2. Build the braaibroodjies: spread butter on one side of each slice of bread (these sides will be facing outward in the assembled braaibroodjie).
Pack half of these slices buttered sides down and layer with marshmallows and chocolate. Close the braaibroodjies with the remaining slices of bread, buttered sides facing upward.