I left a small piece of purple sweet potato, which I bought to make porridge for my 8mo girl. Hence, I decided to make Purple Sweet Potato Chiffon Cake. I modified the recipe from Sherie . This is my 3rd time making this chiffon, but it is the 1st time using purple sweet potato. Other times I was using the normal orange sweet potato.
Ingredients:

A:
135g purple sweet potato (weight without skin)
Ingredients:
A:
135g purple sweet potato (weight without skin)
20g coconut milk (can be replace with milk or water)
B:
4 egg yolk (I use A grade egg)
27g brown sugar (can use normal fine sugar)
pinch of salt
55g canola/corn oil
60g coconut milk (can be replace with milk or water)
114g cake flour/superfine flour.
C:
4 egg white
27g brown sugar (can use normal fine sugar)
pinch of salt
55g canola/corn oil
60g coconut milk (can be replace with milk or water)
114g cake flour/superfine flour.
C:
4 egg white
1/4 teaspoon cream of tar tar
67g fine sugar
Method:
1. From ingredients A, cut or finely grate purple sweet potato, and add the coconut milk. Steam it until the potato are soft, the mashed it.
67g fine sugar
18 cm tube pan, 160 degree Celsius preheat oven.
Method:
1. From ingredients A, cut or finely grate purple sweet potato, and add the coconut milk. Steam it until the potato are soft, the mashed it.
Note: Do not have to puree the potato. Just mashed it using a fork or spoon.
2. From B, using a whisk or a spatula, whisk the yolk + brown sugar -> dissolved.
3. + salt + oil + coconut milk -> well combined.
4. Sift in the flour ->well combined.
5. + mashed potato -> yolk batter.
6. Using a mixer, beat egg white until frothy + tar2 + fine sugar -> stiff -> meringue.
7. Take 1/3 of the meringue and fold into yolk batter
8. Pour yolk batter into the meringue and fold until uniform.
9. Bake for 50 minutes.
10. Cool the cake upside down.
Verdict: