Hi! I’m Elena, your nutrition expert from Castelló. Today we’re going to get into the nitty-gritty, quite literally, to understand the science behind kneading and baking bread.
This morning, as I walked past one of Castelló’s traditional bakeries, I was mesmerized by that unmistakable smell. It’s not just cooking; it’s pure biochemistry. Understanding what happens inside that dough helps us appreciate this ancient food so much more and, why not, encourages us to make it at home with a solid technical foundation.
Kneading: Building the Gluten Network
Kneading is not simply mixing ingredients. It is a homogenization technique in which the proteins in flour (gliadins and glutenins) react with each other in the presence of water and air.
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The elastic network: As we knead, we stretch these proteins to form gluten. Imagine creating a network of long chains that will trap the CO2 produced by the yeast, allowing the bread to rise.
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The importance of resting: It is essential to let the dough rest. During the rest, amino acids form disulfide bridges that give it structure. If it doesn’t rest, the bread turns out dense and hard.
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The role of salt: Beyond flavor, salt strengthens the ionic bonds of the proteins, inhibits enzymes that could break down the structure, and allows the gluten to form properly along with the gas.
Baking: Physical and Chemical Transformation
When we put the dough in the oven, a series of effects are unleashed that change bread forever:
Physical Effects
The first thing we notice is the increase in volume and that irresistible aroma due to the release of volatile compounds. The outside loses water quickly and becomes crispy, while the crumb forms inside.
Chemical Effects
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Gas expansion: Between 25 and 60 °C, the yeast works at maximum speed, producing CO2 before dying from the heat.
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Coagulation: From 60 °C onward, the proteins coagulate and the starch swells as it absorbs the released water. This creates the final elastic structure.
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Maillard reaction: It happens on the surface when 200 °C is reached. It is responsible for that appetizing golden or brown color and the toasted flavor of the crust.
Nutritional Value and Storage
It’s true that baking causes some losses, such as the destruction of vitamin C or amino acids like lysine. However, we gain digestibility and flavor.
My pantry tip for your homemade bread
If you like experimenting at home, you can play with the ingredients to make lighter breads or healthier sweet versions:
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Smart fats: Fats make kneading easier and lubricate the gluten layers. If you’re making a brioche-style bread or sponge cake, remember to add the fat at the end so the dough stays fluffier.
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Sugar-free sweet version: For your sweet doughs, I always use Stevia 1:1 de Castelló. It’s my choice because it measures the same as sugar but with 0 calories, allowing the dough to ferment and bake perfectly
Elena’s "Life Tip"
Patience is an ingredient: Don’t rush the second kneading. After the first rest, the enzymes have already converted the starch into sugars (glucose) that feed the yeast. By kneading a second time, you redistribute these sugars and make the bread rise much more and become lighter. Your digestion will thank you!
Have you dared to make your own bread at home yet, or do you prefer to look for the best crust in your neighborhood? Tell me about your bread-baking experiences!
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