Place ube powder in a medium sauce pan. Add water and cook over medium heat. Bring to a boil and then lower the heat to medium. Keep stirring until ube powder absorbs all the water and gets thicker and paste-like consistency
Dry ube powder is grainy in texture. Rehydrated ube feels soft and shouldn't feel grainy, if it's still grainy, keep cooking. It should feel smooth and taste like mashed ube
Remove from the heat and let it cools down completely. Store in the fridge for up to one week. Keep them frozen for up to one month