01 -
Line an 8x8-inch pan with foil or parchment paper, leaving enough overhang to lift out the finished fudge.
02 -
Melt the white chocolate chips and butter in a saucepan over low-medium heat, stirring until creamy and smooth.
03 -
Microwave the vanilla frosting for 30 seconds, then stir it into the melted chocolate mixture until fully combined.
04 -
Let the mixture cool for 10 minutes, stirring occasionally so it stays smooth without setting.
05 -
Quickly fold in 1 1/2 cups of the fruit-flavored marshmallows and half of the sprinkles.
06 -
Spread the fudge evenly in the prepared pan. Top with the remaining marshmallows and sprinkles and press them in gently.
07 -
Let the fudge set completely, then lift it from the pan and cut it into squares. Chill for firmer, cleaner pieces.