wunder beta🌾 Gluten-free baking: what flour was actually doing
Swap the bag and the loaf collapses. Wheat flour was not a flavour. It was a protein net, and gluten-free baking is the long job of hiring a replacement.
What you’ll learn
- The rubber you wash out of flourDefine gluten as a washable network made from glutenin and gliadin, not as an ingredient already in dry flour.Beccari's washing test still stands: gluten is 75–80% protein rubber you make with water. Glutenin springs, gliadin flows. Barley and rye have cousins, not the same net.
- A batter pretending to be doughExplain why a gluten-free mix is a batter, why gas escapes, and why a cup-for-cup swap is a rebuild not a substitution.Without a viscoelastic film, yeast still makes gas that has nowhere honest to go. Cookies can live on a short crumb. A loaf cannot. Staling also runs faster in a starch-only crumb.
- Starches that set, not stretchSeparate bulk starches from whole gluten-free grains and pulse or nut flours, and see blending as staggered gelatinisation plus flavour.Rice is quiet bulk. Potato, cassava and maize starch set at different times. Sorghum, millet, teff, buckwheat, chickpea and almond bring protein or fat. Injera already knew how to be bread.
- Gums, gels and the borrowed netDistinguish xanthan, HPMC, psyllium and egg by when they act, using Hager 2013 and the psyllium water-binding work.Xanthan can shrink volume by over-thickening a cold batter. HPMC gels in the oven. Psyllium films and slows staling if hydrated. Eggs import a protein wall.
- Why the recipe looks so wetTreat high hydration, a rest, a narrow bake window and a full cool as structural steps, not fussiness.Gums and rice need more water than gluten did. Rest lets them drink. Oven spring is short. Cool before you slice. Density is information.
- Twenty parts per millionPlace Dicke's finding, the three gluten-related conditions, the 20 mg/kg claim, and oat contamination on one honest map.Dicke, 1953, named wheat. Codex and the FDA set 20 ppm. Coeliac, wheat allergy and NCGS are not the same. Oats are free until the silo isn't.
Questions this course answers
Where is the gluten in a bag of wheat flour?
Shewry's definition starts with the washing test: gluten is the mass you make. Dry flour holds two separate storage proteins. Water and work build the net.
Match each protein family to the job it does in a wheat dough
Gluten is a partnership. Glutenin supplies the elastic network; gliadin lets it extend. Barley and rye have cousins, not the same washable rubber.
Why does a cup-for-cup swap of gluten-free flour often work in a cookie and fail in a lean loaf?
Cookies are already trying to limit gluten. Bread is trying to build a balloon. Taking wheat out finishes the cookie's job and unemploys the loaf.
Put these steps of a gluten-free loaf in the order that actually rebuilds structure
There is no kneadable net to develop. The work is hydration, a single proof, a hot set, and a patient cool.
In your own words, why can adding more xanthan gum make a gluten-free loaf smaller rather than taller?
Cold viscosity is not the same as an elastic film. A batter can be too thick to rise and still look 'successfully' dense.
What is the gluten limit, in milligrams per kilogram, for a food labelled gluten-free under Codex CXS 118 and the FDA 2013 rule?
Both Codex and the FDA use 20 mg/kg, which is 20 ppm. It is a validated-test line, not zero, and you still may not add a gluten grain on purpose.
Grounded in trusted sources
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