Churn Method:

1. Prepare the Ice Cream Base: In a mixing bowl, whisk together the whole milk, sugar, salt, and cotton candy flavoring until sugar dissolves. Stir in heavy cream and vanilla extract.
2. Add Color: Divide the mixture into two bowls. Add pink food coloring to one and blue to the other. Stir until combined.
3. Churn the Ice Cream: Pour the base into an ice cream maker and churn according to manufacturer instructions (typically 20-25 minutes).
4. Layer and Freeze: Pour alternating layers of pink and blue into a freezer-safe container. Swirl slightly with a knife for a marbled effect.
5. Freeze: Cover and freeze for 4-6 hours or until firm.

No-Churn Method:

1. Whip the Cream: In a large bowl, whip heavy cream until stiff peaks form.
2. Mix with Sweetened Condensed Milk: In another bowl, mix the sweetened condensed milk, vanilla, salt, and cotton candy flavoring.
3. Add Color: Divide into two bowls, tinting one pink and one blue.
4. Combine and Swirl: Gently fold the colored mixtures into the whipped cream, being careful not to deflate. Swirl for a marbled look.
5. Freeze: Transfer to a container, cover, and freeze for at least 6 hours.