Hydration matters. Not just to athletes and long distance runners. It matters to bakers. How much water is in your dough is crucial to how the crumb develops. It’s amazing how a few grams more or less of water can make a real difference in the resulting loaf of bread.
This week I did a little experiment that got me thinking about hydration. I made a loaf of bread in the machine using the “French” recipe and settings, (see my previous post about making French bread in the machine) but this time substituting the same volume of K2 organic bread flour for the called-for white bread flour. The result was a dense, misshapen loaf – tasty but not anywhere near the result I had expected. Very crisp crust. And I think hydration was the reason.
Or, more accurately, the lack of sufficient hydration for that kind of flour. But because the recipe is in volumetric measurements, not weight, the calculation of actual hydration is at best inexact. In future, I will have to measure then weigh the ingredients before mixing, to better understand the hydration percentage.
K2, by the way, is a small flour mill in Beeton Susan and I visited late last year. Great artisan products, and a bread market on Sundays. Worth taking a trip. I came home with 10lbs each bread flour and Red Fife flour.
Red Fife is a Canadian heritage grain, a whole wheat flour I have only used minimally, but plan to experiment more with in the coming weeks. I do not know the exact protein percentage of either (although this NatPost article suggests Red Fife has lower protein, this report on a lab analysis suggests that’s not true: but that “the gliadin protein level is ~35% of this wheat’s overall gluten protein content. Wheat gluten’s insoluble proteins are gliadin and glutenin. This compares to ~80% gliadin protein levels found in a popular modern bread wheat.” And the nutritional label (see image on left) on this site suggests it’s actually higher protein that commercial AP or bread flours – 15%! Food With Legs site has a label that shows 13%. Harvest Hastings shows it at 13.4%, however… and if you wonder what the falling number of 340 cited is, see here and here*).
In my few tests, whole wheat flours and artisan blends tend to have different weights than the usual commercial bread or unbleached white flour I use. Plus the weight per cup changes depending on whether the flour is sifted or fluffed (or compacted).
My own per-cup weights are sometimes as much as 20% more than those shown in books and on sites for the weight of a cup of flour (typically 125-140 grams unsifted for AP flour, but I’ve weighed it over 160g). That would throw off the recipe’s hydration which is based on commercial all-purpose or bread flour (and a good reason to have recipes listed by weight, not volume).
By the way, Lime Leaves and Taste Buds says this about Canadian whole wheat flour, just adding to the reasons to buy artisan flours rather than commercial blends:
Even more disheartening is that fact that whole wheat flour sold in Canada is not necessarily whole grain due to a ridiculously outdated piece of 1964 regulation which allows millers to legally use “whole wheat” on the label despite their removal of up to 70 per cent of the wheat’s germ!!!
As a sidebar note, the K2 bread flour has a wonderful texture, a bit like having cornmeal added to the bread. That may lessen somewhat if there is higher hydration and longer fermentation time to soften it. However, I really liked the texture and flavour. But back to hydration…