1. First, prepare all the ingredients, including purple potato 100g, sugar 10g, yeast 2g, milk 150g, flour 100g, and dried cranberries.

2. Then clean the purple potato, peel it, cut it into thin slices, and steam it in the pot.

3. Then put the steamed purple potato into a bowl and press it into a paste.

4. Then add yeast and sugar, pour in milk and mix well.

5. Then add flour and continue to stir evenly.

6. Then pour in the batter, cover it with plastic wrap and leave it in a warm place for half an hour.

7. Then please send it to twice the original size, sprinkle with dried cranberries, steam it in cold water for 30 minutes, and turn off the fire for 5 minutes.

8, a delicious purple potato cake is ready!