Gather 1 liter of orange soda and 6 ounces of sweetened condensed milk. Prepare a large mixing bowl, a whisk or spoon, and either an ice cream maker or a freezer-safe baking pan.

Pour the orange soda into the large mixing bowl. Slowly add the sweetened condensed milk, stirring gently until combined. Avoid vigorous stirring to prevent excessive foaming.

Pour the soda and milk mixture into an ice cream maker and start according to the manufacturer’s instructions. Let it churn for about 20-30 minutes until it reaches a soft-serve consistency. For a firmer texture, transfer to a freezer-safe container and freeze for an additional 2-4 hours.

Pour the mixture into a freezer-safe baking pan. Freeze for 1 hour, then remove and stir to break up ice crystals. Repeat 2-3 times each hour. Freeze undisturbed for 6-8 hours until firm.

If too firm, let it sit at room temperature briefly to soften. Scoop and enjoy!