01 -
Line a 9x13 baking dish with foil and lightly spray with cooking spray. Set aside.
02 -
In a heavy 2-quart saucepan, combine granulated sugar, sour cream, butter, and salt. Stir frequently over medium heat.
03 -
Bring mixture to a boil over medium heat, stirring occasionally. Cook until it reaches 238°F (soft ball stage) using a candy thermometer.
04 -
Remove from heat and stir in white chocolate chips until fully melted. This process may take several minutes.
05 -
Stir in marshmallow creme and clear vanilla extract until smooth and fully blended.
06 -
Add dried cranberries and stir until evenly distributed throughout the fudge mixture.
07 -
Pour the mixture into the prepared baking dish. Use an offset spatula to spread and smooth the surface if necessary. Let it cool to room temperature.
08 -
Refrigerate for several hours until firm. Cut into squares before serving.