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 to the blender and blend on high speed until the mixture is completely smooth and has a uniform slushy consistency.
03 - Taste the slush and add more honey or sugar if desired, depending on the natural sweetness of the oranges. Blend briefly to incorporate.
04 - Pour into chilled glasses and serve immediately. Garnish with an orange slice or a fresh mint sprig if desired.