Double Chestnut Whole Wheat Sourdough Hokkaido Milk Bread

For my final bake of 2025 I decided to try something I’ve wanted to for some time.  I love chestnuts, when we were kids, my parents would buy them and we’d roast them.  We had to shell them which wasn’t fun but really isn’t that difficult, but it was so worth it since chestnuts are just yummy.  So for this Hokkaido Milk Bread I’ve added chestnuts two ways.  Some are added as inclusions, chopped.  The majority of them were cooked in milk and then blended.  I used this “chestnut milk” as the hydration for the tangzhong.  Now the chestnut milk is actually quite thick and creamy so I ended up having to add an extra 20 g of milk to the dough as it seemed too dry.  The formula I’ll post below is the one reflecting the extra milk I’ve added and not my original formula.  I’m certainly pleased with the appearance of this loaf.  I’ll slice it tomorrow and see if I can taste the almost 200 g total of chestnuts that are in this loaf.

For one 9x4x4” loaf

Chestnut Milk

150 g chestnuts (roasted and peeled)

250 mL whole milk (250 g)

So total weight 400 g.

“Chop chestnuts into small pieces; place in a saucepan with milk. Bring to a low boil over medium heat, stirring frequently; reduce heat and simmer, stirring occasionally, until chestnuts are softened.

Transfer chestnut mixture into blender and purée, staring on low and then increasing to high, until silky smooth”

Instructions

Levain

Mix the levain ingredients in a jar or pyrex container with space for at least 300% growth.

Press down with your knuckles or silicone spatula to create a uniform surface and to push out air.

At a temperature of 76-78ºF, it typically takes up to 10-12 hours for this sweet stiff levain to be at peak.  For my starter I typically see 3-3.5 times increase in size at peak.  The levain will smell sweet with only a mild tang.

Tangzhong

In a sauce pan set on medium heat, stir the chestnut milk and whole wheat flour until blended. Then cook for several minutes until well thickened, stirring regularly with a spoon or heat-resistant spatula. Let cool in the pan or, for faster results, in a new bowl.  Theoretically it should reach 65ºC (149ºF) but I don’t find I need to measure the temperature as the tangzhong gelatinizes at this temperature.  You can prepare this the night before and refrigerate it, ensure that it is covered to prevent it from drying out.

If you plan on using a stand mixer to mix this dough, set up a Bain Marie and use your stand mixer’s bowl to prepare the tangzhong.

Dough

In the bowl of a stand mixer, add the chestnut milk (consider holding back 10 g of milk and adding later if this is the first time you’re making this), egg, tangzhong, salt, sugar and levain.  Mix and then break up the levain into many smaller pieces.  Next add the flour.  I like to use my spatula to mix until there aren’t many dry areas.  Allow the flour to hydrate (fermentolyse) for 20-30 minutes.  Mix on low speed and then medium speed until moderate gluten development this may take 5-10 mins.  You may want to scrape the sides of the bowl during the first 5 minutes of mixing.  Next add room temperature butter one pat at a time.  The dough may come apart, be patient, continue to mix until it comes together before adding in more butter.  You will want to check gluten development by windowpane during this time and stop mixing to add the chopped chestnuts when you get a good windowpane.  You should be able to pull a good windowpane, not quite as good as a white flour because the bran will interrupt the windowpane somewhat.  Mix until the chestnuts are well incorporated.

To develop by hand, melt the butter and add it with the wet ingredients.

On the counter, shape the dough into a tight ball, cover in the bowl and ferment for 4-6 hours at 82ºF ending bulk fermentation once the dough has risen 30-40%.

You can next place the dough into the fridge to chill the dough for about 1.5 hours, this makes rolling the dough easier to shape.  Remember, if you do so the final proof will take longer.  Alternatively, you can do a cold retard in the fridge overnight, however, you may find that this increases the tang in your bread.

Prepare your pans by greasing them with butter or line with parchment paper.

Lightly oil the top of the dough. Scrape the dough out onto a clean counter top and divide it into four. I like to weigh them to have equal sized lobes. Shape each tightly into a boule, allow to rest 5 mins. Using an oiled rolling pin roll each ball out and then letterfold. Turn 90* and using a rolling pin roll each out to at least 8”. Letterfold again from the sides so you have a long narrow dough. Then using a rolling pin, roll flatter but keeping the dough relatively narrow.  The reason to do this extra letterfold is that the shorter fatter rolls when placed in the pan will not touch the sides of the pan.  This allows the swirled ends to rise during final proof, this is only done for appearance sake and is not necessary.  Next roll each into a tight roll with some tension. Arrange the rolls of dough inside your lined pan alternating the direction of the swirls. This should allow a greater rise during proof and in the oven.

Cover and let proof for  4-6 hours at a warm temperature.  I proof at 82°F.  You will need longer than 4-6 hours if you chilled your dough for shaping. I proof until the top of the dough comes to within 1 cm of the top edge of the pan.  At this point the dough should have risen 130-140% in total from the start of bulk fermentation.

Preheat the oven to 350F and brush the dough with the egg-milk wash.  Just prior to baking brush with the egg-milk wash again.

Bake the loaves for 50 minutes or until the internal temperature is at least 190ºF, rotating as needed to get even browning. Shield your loaf if it gets brown early in the baking process. After 50 mins remove the bread from the pan and bake a further 10 mins by placing the loaf directly in the oven on the rack with the oven turned down to 325ºF.

My index of bakes.