Seeded Buckwheat Whole Wheat Sourdough Soy Milk Avocado Oil Bread

This doesn’t quite follow the guidelines of the Infinity Bread for the Community Bake, but it is my contribution.  My non wheat flour isn’t up to the 33% range that is in the write up.  I chose buckwheat flour which I toasted well to bring out the nutty flavour to the maximum.  I used the toasted buckwheat flour as all the flour in a tangzhong.  The texture of the tangzhong is different from what I’m used it, it was clumpy in lumps rather than one big mass.  I chose toasted black sesame and pumpkin seeds as the inclusions and used golden sesame seeds to top the loaf.  Instead of butter I used avocado oil and instead of cow’s milk I chose a sweetened soy milk.  

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For one 9x4x4” Pullman pan loaf.

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 

To toast the buckwheat flour, place the flour in a saucepan on medium heat.  Toast stirring occasionally until the buckwheat acquires a nutty aroma.  Allow this to cool slightly, then pour in the soy milk.  On medium heat, stir the milk and toasted buckwheat 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 soy milk, egg, tangzhong, salt 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 drizzle in the avocado oil a bit at a time.  The dough may come apart, be patient, continue to mix until it comes together before adding in more butter.  Again, knead until well incorporated.  You will want to check gluten development by windowpane during this time and stop mixing 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.   Add the seeds and mix until well incorporated. 

On the counter, shape the dough into a tight ball, cover in the bowl and ferment for 2 - 4 hours at 82ºF.  There should be some rise visible at this stage.

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 shape into a batard.  Transfer into your prepared pan.

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.

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 and top with seeds (optional).

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.

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My index of bakes.