Interaction of various types of flour with liquid, water absorption capacity of flourMoisture content of flour - one of its most important properties in baking. To determine the water absorption capacity of the flour, measure 25 cm'6 of water into a mortar with a pipette or burette and gradually add flour from a pre-weighed 100 g sample until a normal dough consistency is formed, which is determined by touch: the dough should be neither sticky nor thick ... By weighing the rest of the flour, they find out how much flour was used for kneading. The amount of water is calculated per 100 g of flour, which will characterize the water absorption capacity of the flour.
The water absorption capacity of flour primarily depends on the quantity and quality of gluten, starch, fiber and moisture.Strong flour, which has hard-to-expand gluten, absorbs more water and its gluten remains elastic.
Weak flour absorbs less water and is characterized by less elastic gluten. Dr. Moos argues that the gluten particles of strong flour, by absorbing moisture on their surface, are not impregnated with it. In weak flour, the gluten particles are soaked in water and the gluten becomes easily stretchable.
In addition, the more or less fine structure of gluten is of great importance, which depends on external conditions during and after grain ripening.
On average, 100 g of gluten can absorb about 200 g of water, and 100 g of starch only about 30 g of water. Fiber also absorbs a lot of water, but it easily gives it away when heated.
Hence, it is clear that flour containing better gluten and more shells will have a greater water absorption capacity.The water absorption capacity is usually 12.5% moisture for flour, since an increased percentage of moisture in the flour will reduce the water absorption capacity.
According to the water absorption capacity, the calculation is made on the amount of water that must be added to the flour for kneading the dough.It is very important and
grind size.
Larger starchy particles swell gradually, and the dough, swelling, becomes drier and more elastic.
Smaller flour particles are more likely to be saturated with moisture and the dough remains runny.
However,
large bran particles worsen the baking quality of flour, as they prevent the particles of starch and gluten from forming a viscous mass: being located between them, they make the dough non-viscous.
The high fiber content makes the dough less cohesive and worsens the porosity of the bread.
Flour with high humidity will give less dough yield. Increased moisture in flour enhances the action of digesting enzymes, as a result of which the water absorption capacity of starch proteins decreases.
Maltiness of flour... Malted flour is flour made from sprouted grains, or a significant impurity in flour from sprouted grains.
She has little gluten, she is weak and little elastic and is not able to hold the gases formed during fermentation. The dough from such flour spreads, and the bread is obtained with low elastic sticky crumb, with poor porosity, etc.
For the experiment, I chose 6 types of flour (which was available), - wheat, rye (took peeled), buckwheat, corn, chestnut, barley.
I measured exactly 30 grams of flour each.
Instead of water, curd whey was added with a measuring tablespoon, equal in volume to 15 ml. liquids.
For 30 grams of flour, I poured 3 tbsp into each flour sample. l. measured serum, that is, 45 ml. liquids.
It was based on the texture of wheat flour "liquid sour cream".
Here's what happened, you can see in the photos:
Top row: wheat, peeled rye, buckwheat flour.
Bottom row: corn, chestnut, barley flour.
And now, to each sample of flour (except for wheat), I added so much whey to get the same texture as wheat "liquid sour cream".
Here's how much liquid had to be added in quantity to each sample:
TO
rye peeled flour - + 3 tbsp. l. or 45 ml. liquid, which is 100% in relation to wheat flour.
TO
buckwheat flour - + 4 tbsp. l. or 60 ml. liquid, which is 133% in relation to wheat flour.
TO
corn flour - +3 tbsp. l. or 45 ml. liquid, which is 100% in relation to wheat flour.
TO
chestnut flour - 3.7 tbsp. l. or 55.5 ml. liquid, which is 123% in relation to wheat flour.
TO
barley flour - + 3 tbsp. l. or 45 ml. liquid, which is 100% in relation to wheat flour.
Result:
To achieve the consistency of wheat flour (liquid sour cream), add the following amount of water in milliliters to 30 grams of flour:
to rye flour - 45 + 45 = 90 ml.
to buckwheat flour - 45 + 60 = 105 ml.
to corn flour - 45 + 45 = 90 ml.
to chestnut flour - 45 + 55 = 100 ml.
to barley flour - 45 + 45 = 90 ml.
The most water-absorbing flour is buckwheat
Then I proofed the samples for 40 minutes:
Wheat flour - thickened well
Rye flour - thickened well
Buckwheat flour - thickened well
Corn flour - slightly thickened
Chestnut flour - not thickened at all
Barley flour - slightly thickened
Problems arose with buckwheat flour, when, after pouring with whey, it turned into lumps of cement, and it was necessary to urgently add more liquid and break these lumps and rub it with a spoon for several minutes until the desired result was achieved.
Analyzing the bread recipes on the site, we see the following:
When kneading a dough from only one wheat flour per 500 grams of flour, approximately 260 ml is required. water.
When kneading a dough from 400 grams of wheat flour and 100 grams of buckwheat flour, about 350 ml is already required. water.
The difference is 90 ml. additional water.
You can try to approximate this amount of additional water.
260: 500 = 0.52 x 400 = 208 ml. water is required for 400 grams of flour according to the bread recipe with the addition of buckwheat flour.
How much will the amount of water increase when replacing 100 grams of wheat flour with 100 grams of buckwheat flour.
100 grams x 0.52 = 52 ml. x 133% = 69 ml. 52 + 69 = 121 ml.
Total required amount of water for the entire dough batch.
208 + 121 = 329 ml.
It turns out that you can calculate in advance the additional amount of water for buckwheat (or other) flour, in this example it is approximately 69 ml of water to obtain a normal bun. Although it may happen that you need to add or add 1 tbsp. l. (15 ml) of water, or vice versa, reduce.
Such a control calculation of the ratio of various types of flour and water will help to correctly calculate the required amount of water and at the same time not be afraid that you need to add excess water against recipes with only one wheat flour.
I hope my observations and experiments with flour and liquid will help you understand their interaction with each other and determine the amount of liquid when kneading dough with the addition of flour of these types. And, of course, it is necessary to increase the liquid in proportion to the amount of added flour, and not to the amount of basic wheat flour.