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Need help to convert recipe

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Lindley's picture
Lindley

Need help to convert recipe

Hello!


Could anyone help me to convert this recipe from 100% hydration to 50%? I tried to calculate it, but I'm not sure.


Recipe:


Ingredients:
# 120 grams or 1/2 cup active sourdough starter (100% hydration)
# 340 grams or 2.25 cups bread flour
# 8 grams or 1 1/8 tsp salt
# 210 grams or 3/4 cup + 3 Tbs Water
# 150 grams or 1 cup dried tart cherries
# 125 grams or 1 scant cup big chunks of chocolate


My calculations:


Original recipe has


110g flour (from starter) + 340g flour = 450 flour total


110g water (from starter) + 210g water = 320g water total


If I use 50% starter


80g flour (from starter) + 340 flour = 420 flour total


40g water (From starter) + 210g water = 250g water total.


Thus, to reach the total of original recipe, I'll need to add (450-420=30g flour) and (320-250=70g water). Am I right?

jpchisari's picture
jpchisari

Hi Lindley,


    If i understand what you are trying to do these proportions below should work, without changing the original 100% flour.


 


Starter  170g


Flour   340g


Water   128g    


 


50% starter at 100% hydration =85g water


85g of flour from starter + 340g of total flour = 425 g


50% hydration x 425g flour = 213g - 85water from starter = 128.


 


John


 


 


 


 


 

jleung's picture
jleung

The overall hydration of JMonkey's Chocolate Cherry Sourdough is 67.5%, not 100%. The 100% only refers to the hydration of the starter. I'm assuming you want to use 120g of starter at 50% hydration (firm) instead of a starter at 100% hydration (liquid).


The original recipe uses 120g of 100% hydration starter, so there is 60g flour + 60g water, not 110g flour + 110g water - that would have given you a 100% starter but at a total of 220g. Anyway, the flour and water totals in the final dough are as follows:


amount of water = 60g (from starter) + 210g (in final dough) = 270g


amount of flour = 60g (from starter) + 340g (in final dough) = 400g


If you want to use 120g of 50% hydration starter, there is 80g flour + 40g water. To maintain the final overall hydration of 67.5%,


amount of water you'll need = 270g - 40g = 230g


amount of flour you'll need = 400g - 80g = 320g


Does that make sense?


* * *


You could also just take a small portion of your firm starter and convert it to a liquid starter for this recipe. Say, if you take 30g of ripe, firm (50%) hydration starter:


30g firm (50%) hydration starter = 20g flour + 10g water


and you want a total of 120g liquid (100%) hydration starter = 60g flour + 60g water


Simply add 60g - 20g = 40g flour and 60g - 10g = 50g water and you'll have 120g of a just-fed, liquid 100% hydration starter.


Hope that helps.


I'm making the chocolate cherry sourdough today - it`s fermenting right now.


- Jackie


 

PeteInAz's picture
PeteInAz

reducing the water to 140 grams and leave everything else the same?