Using a handheld mixer, whip the butter for a minute or so, until there are no large chunks.
Add in the blood orange juice, blood orange zest and unrefined powdered sugar. Continue beating until the butter is light and fluffy. You may need to start the mixer at low-speed to avoid splashing the blood orange juice.
Serve immediately.
You can store unused butter in the refrigerator, but once butter softens and hardens, the texture will slightly change.