Xanthan gum alternatives: psyllium, guar, chia and flax
Xanthan gum is the binder most gluten-free recipes call for. A small amount makes batters thicker and doughs more cohesive, because it does a little of the work that gluten does in wheat baking. Some people avoid it because it is hard to find, because it upsets their digestion, or because they simply do not have any in the cupboard. Others find a recipe that includes it and wonder whether it is needed at all. This guide explains what a binder does, how four common alternatives behave, how they differ by type of bake, and the cases where it is reasonable to leave the binder out. It keeps to general principles, because the right amount depends on the recipe and the flour blend.
What a binder does
Gluten-free flours are mostly starch. Without gluten there is nothing to hold the mixture together or to trap the gas from raising agents. A binder is a gum or fibre that thickens water into a gel. In batters, that gel makes the mixture thicker and slower to let bubbles escape. In doughs, it helps pieces stick together so the dough can be shaped, and in baked goods it helps the crumb hold together so slices do not fall apart.
Xanthan gum is made by fermenting sugar with a bacterium and drying the result, and it is sold as a fine powder. Guar gum comes from the guar bean. Psyllium comes from a seed husk, and chia and flax are seeds. All of them swell in water, but they feel different in the mix, and they do not replace one another one for one.
The alternatives compared
| Binder | What it is | Behaviour | Best suited to |
|---|---|---|---|
| Xanthan gum | Fermentation-made gum, fine white powder | Strong gel at small amounts. Works in cold and hot mixtures. | Cakes, bread, pastry, pizza dough, sauces |
| Guar gum | Ground guar bean | Thickens cold liquids well, so is common in ice cream and other cold mixtures. Can make baked goods slightly gummy if overused. | Cakes, muffins, cold desserts |
| Psyllium husk | Seed husk, as flakes or powder | Forms a thick, elastic gel and holds moisture. Adds fibre and a slightly earthy flavour, and darkens crumb. | Yeast bread, pizza, flatbreads, some pastry |
| Ground chia | Ground chia seeds | Gels in water. Gives a mild nutty flavour and visible specks. | Muffins, cookies, quick breads |
| Ground flax | Ground flaxseed | Gels in water. Gives a nutty flavour and a brown colour. | Muffins, cookies, bread, burgers |
Psyllium, chia and flax also add fibre. Psyllium in particular is a bulk-forming fibre, and eating a lot of it suddenly can upset digestion, so recipes that use large amounts are not for everyone. Guar gum and xanthan gum are also used as additives in processed food and some people find they cause bloating. If you have a medical reason for avoiding any of these, talk to your doctor or dietitian.
Amounts: only where standard
There is a widely quoted starting point for xanthan gum in a homemade blend: roughly half a teaspoon per cup of flour for cakes and a larger amount, up to about a teaspoon per cup, for bread. Our guide to flour blends covers that. Published conversions for guar gum range from the same amount as xanthan to about one and a half times as much, so treat any swap as a trial and start at the lower end.
For the others, no single standard conversion exists, because they are different materials and recipes are written around them. Seed binders are usually made as a gel first: ground flax or chia stirred into water, left to thicken for several minutes, then added to the mix. The gel ratio that most recipes use for one flax or chia egg is covered in our guide comparing them. Psyllium recipes name the form (whole husk or powder) and an amount, and the two forms are not interchangeable by volume.
If a recipe asks for xanthan gum and you have none, the safest approach is to find a recipe written for the binder you have, or a flour blend that already includes a binder, not to calculate a substitution yourself. If you must swap, change only one thing at a time, and treat the first attempt as a trial.
Matching the binder to the bake
- Yeast bread and pizza dough: psyllium is the usual choice, because its elastic gel holds gas. See the guide to gluten-free bread basics.
- Cakes and cupcakes: a little xanthan or guar. Seed gels can make the crumb dense, and they add colour. A cake that already has eggs, or a vegan egg replacer, needs less additional binder.
- Cookies: often need little or no binder. Ground flax or chia works if you want more chew.
- Muffins and quick breads: ground flax or chia, or a small amount of xanthan. Fruit purée and plant yogurt also add some binding.
- Pastry and pie crust: xanthan or psyllium. A crumbly dough usually needs a binder to be rolled at all.
- Burgers, patties and fritters: ground flax, chia or psyllium, as covered in our guide to egg-free savoury binders.
- Sauces and gravies: a starch slurry is a more usual thickener than a gum; see the thickeners guide.
A flour blend sold as all-purpose usually states whether it already contains a binder on the packet. Adding more on top of that can make the bake gummy, so check first.
When you can leave the binder out
Not every gluten-free bake needs a binder. Some bakes get their structure from something else, and for those, extra gum can make the result rubbery.
- Recipes built on eggs or an egg replacer, which already hold the mixture: some sponge cakes, brownies and flourless cakes.
- Recipes based on ground nuts, such as almond cakes and macaroons, where the nut paste binds.
- Cookies and shortbread, where the fat and sugar hold the dough, and a crisp, crumbly texture is the goal.
- Batters for pancakes and crêpes made from buckwheat or chickpea flour, which tend to hold together from their own proteins and starch.
- Crackers and flatbreads rolled thin and baked crisp.
- Recipes that use a flour blend which already includes a binder.
Leaving the binder out makes a bake crumblier, and in bread it affects rise and slicing. If you leave it out of a recipe that was written with it, expect a different result, and try a small batch first.
Labels and allergies
Xanthan gum can be made from fermented corn, soy or wheat sugar sources, and the product itself is usually described as gluten-free, but check the label of the specific brand if you are avoiding gluten or an allergen. Flax, chia and psyllium products can be processed in facilities that handle wheat, so look for a gluten-free label if you have coeliac disease. A coeliac society or clinician is the right source of advice on what is safe for you.
What this guide is based on
- That gluten-free flours lack gluten, that gums and seed gels thicken water and help hold gluten-free mixtures together, and that psyllium is a bulk-forming fibre, is general food-science knowledge.
- The starting amounts for xanthan gum, about half a teaspoon per cup of flour for cakes and up to about a teaspoon per cup for bread, are widely published rules of thumb and appear in our flour blends guide. They are not results from our own testing. No other amounts are given because no standard conversion between binders exists.
- Which binder suits which bake, and when a binder can be left out, is a judgement from how ingredients generally behave. We have not baked every combination for this guide.
- Allergy, coeliac and nutrition statements are general. Read ingredient labels and ask a doctor or dietitian about your own needs.