Prep the oranges. Peel and segment the oranges, removing as much of the white pith as you can.
If you have time, freeze the segments for 30–60 minutes for an icier texture.
Add liquids first. Pour the milk into your blender. Adding liquids at the bottom helps the blades catch and blend smoothly.
Layer the rest. Add yogurt, protein powder, vanilla, salt, oranges, frozen mango (or pineapple), and frozen banana. If using, add chia or flax and a little orange zest.
Blend until creamy. Start on low, then increase to high for 30–60 seconds.
If it’s too thick, splash in more milk. If it’s too thin, add a few ice cubes or more frozen fruit.
Taste and adjust. Blend in honey or maple syrup if you want more sweetness. Add a pinch more salt or a dash of vanilla to sharpen the creamsicle flavor.
Serve right away. Pour into a chilled glass.
For a protein-packed snack, pair with a handful of nuts or a slice of whole-grain toast.