Add sugar, cream and butter to a small saucepan. Set aside.
Measure out chocolate chips and marshmallow cream, you will need to mix that in quickly!
Heat sugar mixture over medium low heat to melt sugar.
Bring to a rolling boil, stirring continuously, for 1:30 minutes.
Remove from heat and immediately stir in chocolate chips and marshmallow cream. Stir until smooth.
Stir in choice of flavoring extract or oil. Taste as you add to get your desired flavor.
OPTION 1) FOR MARBLED EFFECT: Stir sprinkle mix in while still warm. Sprinkles will melt leaving smears of color throughout the white fudge.
OPTION 2) FOR WHOLE SPRINKLES: Cool mixture by stirring, about 15 minutes. Add sprinkles and fold in quickly.
Scoop into mini cupcake liners (no need to spray).
Press top flat with Mini Tart Shaper.
Place or sprinkle additional sprinkles as desired