The Fresh Loaf

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kmcquade's picture

Spreadsheet for Hydration Calculation adjustments for use with starters and soakers

March 11, 2013 - 8:28am -- kmcquade

I need a few people to test out my hydration spreadsheet for determining adjusted hydrations when using a 100% starter and soakers .

Right now it only works under the assumption that you are using a 100% Starter - but I am working on that .

You can to the link and a viewer will come up , under file choose  save as excel file .

Please let me know what you think.

Thanks

Kevin

https://docs.google.com/file/d/0B_xic1-Lf9TDY1FWcUU1SDR5WEk/edit?usp=sharing

VonildaBakesBread's picture

Hydration videos

February 22, 2013 - 10:09am -- VonildaBakesBread
Forums: 

Is there anywhere I can see a video, or videos, that show me what a 75% hydration, and a 60% hydration dough "should" look like? Would whole wheat and white look the same with the same hydration? My grandma always "knew" what it should look like, but I was just a teen and didn't pay much attention. *facepalm*

Blessings,

Voni

VonildaBakesBread's picture

Hydration

February 21, 2013 - 10:28pm -- VonildaBakesBread
Forums: 

If two recipes are both about 75% hydration--one has buttermilk, the other doesn't--why would the buttermilk recipe be beautiful and perfect, while the other is a sloppy mess on my counter? I am counting the water and the buttermilk as 1 g per ml (figuring the buttermilk is close enough), and I am counting honey as .5 g of water content per ml. Are my figures off? Different flours? Is it that I'm not measuring by weight, so I can't really compare? (Can't wait to get a baker's scale--hint-hint for Mother's Day)

Should a 75% hydration dough be sloppy like that?

kmcquade's picture
kmcquade

Sometimes I look through recipes and don’t have what they require or just want to use stuff up that I have. Lately I have been enjoying my seed and grain breads, and mixed flour breads. I had some nice organic brown rice and some millet I wanted to use up. Personally, I think the hydration in dough is often the deciding factor in a quality outcome so I try to pay attention to that and try to determine it for recipes I review.

 OK, so first I needed to decide how much bread to make. For this experiment I figured I would start with a 1kg loaf just to test.

  • I was shooting for about 70% hydration.
  • I wanted to use my nice organic Starter about 30%
  • I figured about 1 cup of the cooked rice and millet would be a good amount
  • I wanted some milk contribution for softness
  • I wanted some organic brown sugar for sweetness

So here is the method I used.

So my initial plan was to use 500gm Organic AP flour

  • 150 gm. Starter (30% of 500)
  • 113.5 gm. cooked millet (about 4oz)
  • 113.5 gm. cooked organic brown rice (about 4 oz.)
  • 113.5 gm. Milk (about 4oz) (2% low fat  is all I had )
  • 2TBSP Brown sugar
  • 1.5 TSP Salt – just from experience about the right amount.

Also just to hedge by bet, I spiked with about ¼ tsp. instant yeast in case my starter is not behaving – I did feed the starter 2 times prior to use.

Water? How much water should I add?

Given a 150 gm. of a 100% starter, that means it contains 75gm flour and 75gm water

So my total flour was 500+ 75 = 575

For basic 70% hydration this would need .70(574) = 402gm water

 But,  there is already 75 gm. of water from the starter, and there is a lot of water in the cooked rice and millet ? How much you ask?

Well I assumed a 2:1 ratio because I used 2 cups of water for 1 cup of rice

This would mean that if I used 113.5 gm. cooked rice  A little math shows that:

The rice was 37.83 gm. and the water was 75.66 gm.

Here is the math for those interested

                        R=rice , W = water.

(eq 1) R+W =113.5

(eq2) W= 2(R) (water is twice as much as the rice weight)

            Substitute EQ 2 into eq 1

(eq3)  R+ 2R = 113.5

            Solve for R

R(3)= 113.5

R= 37.83

W=2R = 75.6

 I was not sure about the millet, because I did not take exact measures when cooking it so I assumed that same 2:1 ratio  - and used 75 gm. for the water component of the millet too.

 Ok so now we have:  desired water 402 gm. – 75gm (from the starter) – 75gm (from the cooked rice) – 75 gm. (from the cooked millet)  = 177gm

But don’t forget I have 113gm of milk,  so 177-113= 64 gm. of water needed to get close to a 70% hydration.

So what happened – Theory meets reality.

When I mixed it all up the dough seemed too dry, so I needed to add another 30 gm. of water or so. I believe I overestimated the water contribution from the rice and the millet. What I should have done was precisely measure the rice and millet  and water separately. Even that, it’s hard to determine the amount of water evaporated during cooking anyway.

 If I just used my original estimates and added 30 gm. H20  I get a hydration of 64% which is about how it felt under my hands – close to the hydration of a French bread ( 65%) but of course heavier because of the grains . My final dough weight was 1,117 gm. pretty close to my 1,000 gm. initial goal.

 On to phase 2 – the dough was on the cusp of being able to hand knead vs. having to do stretch and folds  ( I might add ,all my breads are hand needed – no mixer) .  I let it bench rest for about 1 hour in a cold Seattle Feb kitchen and did a couple stretch and folds then placed in the fridge overnight.

Pretty sticky dough

 Day 2

Out of the fridge the next morning for a few hours because it is cold in our kitchen – then shaped and proofed if for about 1.25 hrs. Bake in a cloche 475F covered 15 min, uncover and bake for another 15min at 450. It still was not reading hot enough inside probably because of the rice and millet, so it took another 15 at 420. (I find I get a crispier crust if I progressively decrease the temps.)

Result See picts

Moist Chewy sweet crust with that nice millet essence and color.

 

 

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