Line an 8×8-inch pan with foil or parchment for easy removal.

Break white chocolate bark into pieces and microwave in 30-second intervals, stirring until smooth.

Stir in sweetened condensed milk and a splash of cotton candy flavoring until creamy.

Divide mixture into two bowls; add blue coloring to one, pink to the other, mixing until uniform.

Spoon alternating pink and blue scoops into the pan; gently swirl with a toothpick to create a marbled effect.

Refrigerate for about 2 hours until firm.

Lift fudge from pan, cut into bite-sized squares, and serve.