01 - Add the freshly squeezed orange juice, orange zest, vanilla ice cream, heavy cream, whole milk, honey (or sugar), and vanilla extract to the blender jar.
02 - Add the ice cubes and blend on high speed until the mixture is completely smooth and has a thick, slushy consistency.
03 - Taste the slush and add more honey or sugar if needed, depending on the natural sweetness of the oranges. Blend briefly to incorporate.
04 - Pour into chilled glasses and serve right away. Garnish with an orange slice or a fresh mint sprig if desired.