Cake size: 5 inch

1. Remove the skin of sweet potato and cut into pieces, 120g for rice cake, 150g for filling.
2. Put into steamer, steam for 20 minutes with medium heat.
3. Mash the sweet potatoes as potato filling, add 1 tsp hot water and 10g sugar, mix well.
4. Mix rice flour, glutinous rice flour and 120g sweet potato filling and
5. Pour 40ml water and knead, mix with 20g sugar.
6. Two cooking methods, method one use cake rings to make rice cakes.
7. Put a layer of purple sweet potato rice flour.
8. Add into brown sugar filling, then cover with another layer of sweet potato rice flour.
9. Gently loosen the cake ring so that the rice flour will not stick to the cake ring.
10. Put into steamer, steam over medium heat for 15 minutes.
11. Takeout cake rings from steamer, steam over medium heat again for 15 minutes.
12. Method two is use cake pan to make rice cakes, brush a thin layer of oil on the cake pan.
13. Put a layer of purple sweet potato rice flour, place filling, cover with another layer of sweet potato rice flour.
14. Steam over medium heat for 30 -35 minutes.
15. Cut the rice cake into small pieces, drop nuts and dried fruit on surface.