I remembered that I had been searching for a hundred kinds of practices of fast-food cereals before, and then accidentally found that this method is very delicious, then set up a recipe for everyone to search ~
Purple potatoes are peeled, diced, and boiled in water (this time the water will turn into the same color as the pen water, don't be afraid, it will become powder after adding coconut milk.)
The purple potato is boiled and the powder is added. Put the coconut milk in water (just put it in the cake, I am like this =_=). Add sugar and salt. carry out.
Occasionally change the taste~