01 -
Line a 9x9-inch baking pan with parchment paper, letting the edges extend over the sides.
02 -
In a separate bowl, combine the semi-sweet chocolate chips and red food coloring. Set aside.
03 -
Melt the unsalted butter in a large saucepan. Add the granulated sugar and half-and-half cream, mixing until well combined.
04 -
In another bowl, combine the white chocolate chips and marshmallow crème.
05 -
Stir the vanilla extract, white chocolate chips, and marshmallow crème into the butter and sugar mixture until smooth.
06 -
Quickly transfer about half of the white chocolate mixture to the bowl with the red-tinted chocolate chips, stirring until the chocolate is fully melted.
07 -
Spoon dollops of both mixtures into the prepared pan. Level the surface by giving the pan a gentle shake. Use a small knife to create swirl patterns in the fudge.
08 -
Allow the fudge to cool completely. Lift the fudge from the pan using the overhanging parchment paper and cut into squares.