01 - Combine mashed ube, granulated sugar, coconut milk, ube extract, and a pinch of salt in a saucepan. Cook over medium heat, stirring constantly, until the mixture is silky and begins to thicken, approximately 5 minutes. Remove from heat and allow to cool to room temperature.
02 - Place unsalted shelled pistachios, milk, heavy cream, honey or sugar, vanilla extract, and salt in a blender. Process until a completely smooth consistency is achieved. Transfer the mixture to a saucepan and gently heat over medium-low, stirring frequently, for 5 minutes. Avoid boiling. Remove from heat and cool.
03 - Pour the cooled ube mixture into ice cream bar molds, filling each mold halfway. Freeze for 1 hour until partially set. Once firm, top with pistachio mixture to fill molds completely and insert popsicle sticks. Freeze for a minimum of 5 hours, ensuring bars are fully hardened.
04 - Remove bars from molds. For an enhanced finish, drizzle with sweetened condensed milk and garnish with chopped pistachios prior to serving.