This recipe was using an overnight dough method. I adapted this recipe from Kimmy’s Cooking Pleasure. I really admire Ms. Kimmy. She has made quite a variety of homemade bread for herself and her husband’s breakfast!
Purple Sweet Potato Swirl Loaf (recipe yields around 930 grams of dough)
- 150 grams plain flour
- 150 grams bread flour
- 3.5 tsp instant yeast
- 250 ml of water
- Mix everything together in a large bowl until a soft rough dough is formed. Cover with cling wrap and leave overnight in room temperature.
- 300 grams bread flour
- 2 tbsp milk powder
- 3 tbsp sugar
- 1 tsp salt
- 100-150 ml water
- 60 grams unsalted butter, softened
- 10 grams purple sweet potato powder
- Add all the ingredients above except water, butter and sweet potato powder into the overnight dough. Gradually add water and knead until a soft dough is formed.
- Add butter and knead until dough is elastic and passes the window-pane test. This can take around 25-40 minutes.
- Place dough in a lightly oiled bowl, cover with cling wrap and leave to proof for an hour, or until dough doubles in size.
- Scrape out dough onto a lightly floured board from a height of 30 cm. This will deflate the dough. Knead for 5 minutes.
- Divide the dough into 2 portions. Wrap 1 portion in cling wrap and place aside. For the other portion, knead together with sweet potato powder until fully incorporated and color is uniform. This should take about 5-8 minutes. Cover with cling wrap and rest dough for 10 minutes.
- Roll white portion into a rectangle about 20 x 40 cm. Do the same for the purple dough. Stack the purple dough onto the white dough and roll it up, swiss-roll style. Place inside tin and proof until it fills 90% of the tin. Brush with egg wash and bake at 170 C for 50-55 minutes. I baked mine for 40 minutes and the bottom was under-cooked. I think another 10 minutes would be better. So keep an eye on the bread. Cover top with an aluminum foil if it browns too quickly.
- Remove bread from pan and cool on a rack completely before cutting.
Note: I used a Pullman tin, without the lid, measuring 18.5 x 10 x 10.5 cm.
During my trip to Tokyo, I found purple sweet potato powder at Tokyu Hands at Shibuya.
It was so hard to resist and even though I had no idea during then what I was going to do with it, I bought a few packets. 😛 The smell is so sweet potato-ish. Bread texture is soft and fluffy, even on the next day.