
For the benefit of those whom has not seen a purple sweet potato before, I have attached a photo of the root for your viewing reference. :)

Ingredients for Purple Sweet Potato Milk Loaf:
400g bread flour
220g purple sweet potato, peeled, sliced, steamed and mashed
60g caster sugar
1 large egg (AA)
1 tsp salt
1 tsp instant active yeast
60ml fresh whipping cream
100ml fresh milk (more or less depending on the moisture left in the mashed potato)
60g unsalted butter, room temperature
1 cup big plum raisins
Method:
- Mix all ingredients except butter and raisins in a large mixing bowl to form a soft dough. Knead the dough till it is not sticky, about 20 minutes.
- Add the unsalted butter in and continue to knead till the dough is shiny and elastic. To test if the dough is ready, pull a small piece off and stretching it with your fingers. If dough is very elastic and pulls to almost see through without breaking, then it's done.
- Place dough in a greased bowl and cover with plastic wrap and allow to proof for at least 90 minutes.
- Punch out the air in the dough and divide it into 4 equal portions.
- Roll out each portion into a long flat oval shape and scatter the raisins on top. Then roll up one end to make it into a swiss roll form.
- If you want to make everything into one large loaf, repeat with the other 3 dough portions and place in a 9" by 6" bread tin. Else you can do like I did, use only 3 portions in a 8" by 5" loaf tin and the last dough portion in a smaller mold (I used a mini tube pan). Let proof for another 90 minutes or it rises to 90% of the tin.
- Preheat oven to 180°C.
- Brush loaf top with egg wash and bake in the oven for 35 to 40 minutes. If top browns too quickly, cover with foil and reduce heat to 170°C and bake till time is complete.
- Remove from bread tin immediately when done and cool on rack completely before slicing. Enjoy!


So, if you do see purple sweet potatoes coming to a store near you, you know what you need to do next, haha! Enjoy!