STEP 2/4
In a hand mixer, adjust the sugar content with milk, boiled sweet potatoes, a little salt, and honey and sugar to your liking. (A little bit of salt makes it sweeter. I didn't put sugar or honey because the sweet potatoes were sweet today.)
STEP 4/4
You can heat the milk to the point where it's bubbling up, and grind it with the sweet potato, but I think it's better to boil it again like this. Put it in a cup and sprinkle a bit of cinnamon powder. It's a sweet potato latte that smells amazing.