01 - Add the freshly squeezed orange juice, orange zest, vanilla ice cream, heavy cream, whole milk, honey (or sugar), and vanilla extract into a blender.
02 - Add the ice cubes and blend on high speed until the mixture is completely smooth and no ice chunks remain.
03 - Taste the slush and add more honey or sugar if desired, depending on the natural sweetness of the oranges.
04 - Pour into chilled glasses and serve immediately. Garnish with an orange slice or a sprig of fresh mint if desired.