The Fresh Loaf

News & Information for Amateur Bakers and Artisan Bread Enthusiasts

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Scott Grocer's picture

Hydration: Effect of potatoes?

February 22, 2011 - 5:25pm -- Scott Grocer

Does anybody have a good rule of thumb for calculating the hydration of a dough when it includes plain, cooked and mashed potato?

According to the USDA: Potatoes, baked, flesh, without salt (100 grams) contain on average 75.42 grams of water. That sounds right I guess, but how much of that moisture is available to the dough, and how should I adjust hydration in relation to potato content?

Thanks

Scott Grocer's picture

Help adapt formula for use with levain

February 3, 2011 - 1:38pm -- Scott Grocer

I've got a formula for a nice American style pizza dough that rises in the refrigerator for 24-48 hours, but I was thinking about swapping the instant dry yeast and long ferment for a levain so I could do silly stuff like make same day sub rolls or maybe even soft dinner rolls. Mostly I just wanted something to experiment with.


The problem is that I just can't seem to grasp how to adapt the formula. I was thinking about plugging say, 20% Biga (100% flour, 60% water, 0.2% yeast) into the following formula in place of the IDY:

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