You can buy back from the supermarket black powder into a bowl, add pure water and mix well, add water to the pot to boil the black powder into the boil, while cooking and stirring, and when it cools down, it can be eaten.
You can also put the black rice and soaked black beans, clean water after washing with a soybean milk machine into a pulp, the pea starch and water in accordance with the ratio of 1:1 mixing, will be squeezed to slag the soybean milk, put into the pot to boil, and then pour into the starch paste, while cooking and stirring, to the pot appeared in the air bubbles, you can turn off the fire.
And after the black cold noodles are done, you can also add honey, milk, sugar water to eat, you can also mix fruits and sauces to eat, so you can say that you can eat how you want to eat.