01 -
Line a 9 by 9 inch baking pan with parchment paper, ensuring the paper overhangs for easy removal.
02 -
Combine white chocolate chips, sweetened condensed milk, and unsalted butter in a microwave-safe bowl. Heat in 40-second intervals, stirring thoroughly between each burst, until the mixture is completely melted and smooth.
03 -
Mix in the bubble gum flavoring and vanilla extract until fully blended.
04 -
If desired, divide the mixture into two separate bowls. Tint one part with white food gel and the other with pink food gel. Swirl the tinted portions together gently to create a marbled effect.
05 -
Fold the mini marshmallows into the warm chocolate mixture with a spatula, distributing evenly.
06 -
Pour the mixture into the lined pan. Smooth the surface with an offset spatula and immediately sprinkle confetti rainbow sprinkles over the top.
07 -
Refrigerate uncovered for at least 2 hours, or until fully set. Lift the fudge out using the parchment overhang, slice into 16 even squares, and serve.