- Pour the Jell-O powder into a large mixing bowl.
- Add 1 cup boiling water and whisk until completely dissolved.
- Stir in 1 cup ice water until the ice melts (or use very cold water).
- Refrigerate for 20 to 30 minutes, until it reaches the consistency of egg whites or lightly thickened syrup. It shouldn't be fully set.
- Add the Greek yogurt and casein.
- Using a hand mixer, beat on high for 4 to 6 minutes. It will become lighter in color and nearly double in volume.
- Spoon into a large bowl or individual containers.
- Refrigerate another 1 to 2 hours to fully set.


