Gluten-Free Flour: What Is in the Blend, Shelf Life and Swaps

A mix of rice, starches and other wheat-free flours. Same calories as wheat flour, about 40% less protein, and it goes stale faster in the cupboard.

Also called gluten free flour blend, GF flour, gluten-free plain flour, gluten-free all-purpose flour, 1 to 1 baking flour

Suitable for

Vegan: yes
Vegetarian: yes
Gluten-free: yes
Dairy-free: yes
Nut-free: it depends
Soy-free: it depends
Keto: no
Paleo: no
Low FODMAP: it depends

Contains

None of the major allergens as an ingredient · Some UK gluten-free flours use Codex wheat starch. Read the list if you avoid all wheat.

Per ¼ cup (30 g)

a good source of manganese

Nithyasrm, CC BY-SA 4.0, via Wikimedia Commons, converted to WebP

Gluten-free flour is any flour without wheat, barley or rye, but the bag sold as "gluten-free plain flour" is almost always a blend. Rice flour gives it body, potato and tapioca starch make it soft, and maize or buckwheat round out the flavour. Many brands add xanthan gum, which does some of the binding gluten would do.

Nutritionally it is close to white wheat flour, not lighter. The real differences are lower protein, a shorter cupboard life and the fine print on the ingredients list.

If you bake for someone with coeliac disease, keep the kit apart too: a separate sieve, clean bowls and a fresh tub of baking powder labelled gluten-free. Pair the flour with coconut sugar or plain sugar and cacao for brownies, which are one of the bakes where nobody can tell the difference.

Is gluten-free flour vegan, gluten-free or allergen-free?

Diet	Suitable?	Why
Vegan	Yes
Vegetarian	Yes
Gluten-free	Yes	When sold as gluten-free, it must test at 20 ppm of gluten or less in the UK and EU. Buy flours labelled gluten-free rather than loose flours, which can pick up wheat in mills and shops.
Dairy-free	Yes
Nut-free	It depends	Rice-based blends usually are. Some "1 to 1" and cake blends include almond flour, so check the list and the "may contain" line.
Soy-free	It depends	Most plain blends are, but a few bread mixes add soya flour.
Keto	No	About 24 g of carbohydrate in 30 g, close to wheat flour. Almond or coconut flour are the low-carb options.
Paleo	No	Most blends are grain-based (rice, maize). Cassava, tapioca and nut flours are the usual paleo picks.
Low FODMAP	It depends	Rice, maize, potato, tapioca and buckwheat flours are generally low FODMAP, but amaranth flour is not, and some blends add inulin or apple fibre. Check the Monash app for the product you buy.

Plain rice, maize, potato and tapioca contain none of the 14 major allergens. Blends are where the surprises are: some add almond or coconut flour, soya or chickpea flour, or lupin, which is a listed allergen in the UK and EU. Some specialist UK products also use gluten-free (Codex) wheat starch, which Coeliac UK says is washed down to 20 ppm of gluten or less and must always be named in the ingredients list. It is within the legal limit, but people with a wheat allergy, as opposed to coeliac disease, need to avoid it.

Calories and nutrition in gluten-free flour

Nutrient	Per ¼ cup (30 g) (30 g)	Per 100 g
Calories	110 kcal	366 kcal
Protein	1.8 g	6 g
Carbohydrates	24 g	80.1 g
Sugars	0 g	0.1 g
Fibre	0.7 g	2.4 g
Fat	0.4 g	1.4 g
Saturated fat	0.1 g	0.4 g
Sodium	0 mg	0 mg

Vitamins and minerals

Nutrient	Per 100 g	% Daily Value per 30 g
Manganese	1.2 mg	16%
Selenium	15.1 µg	8%
Vitamin B6	0.44 mg	8%
Niacin (B3)	2.59 mg	5%
Thiamin (B1)	0.14 mg	4%
Zinc	0.8 mg	2%
Phosphorus	98 mg	2%
Magnesium	35 mg	3%

"Rich in" means at least 20% of the adult Daily Value in one serving, and "good source" means at least 10%, following US label rules.

White rice flour, the base of most blends: USDA FoodData Central 169714. Blends with buckwheat, sorghum or nut flours have more protein and fibre, so check your pack.

Using gluten-free flour in the kitchen

What gluten-free flour tastes like

Mostly neutral. Rice-heavy blends can feel slightly gritty in shortbread and sponge, which is why many brands mill the rice very fine and add potato or tapioca starch. Buckwheat adds an earthy, slightly grey note.

How to use gluten-free flour

Blends work best in recipes where wheat gluten does little: cakes, brownies, pancakes, crumble, batter and sauces. Bread is harder, because nothing in the blend stretches like gluten. Recipes make up for it with xanthan gum, psyllium husk or egg, and a wetter dough. For a roux, use the same weight of fat and blend, add the flour slowly and stop at a light brown, as gluten-free flours thicken faster and can turn pasty. In bakes, a wheat recipe usually works one for one with a "plain" gluten-free blend if you add about ½ tsp xanthan gum per 150 g, unless the blend already contains it.

Substitutes for gluten-free flour

Substitute	How much	Best for
Home-made blend	2 parts fine rice flour, 2/3 part potato starch, 1/3 part tapioca starch	Cheaper than branded blends and nut-free. Add your own xanthan gum for cakes.
Buckwheat flour	Up to half the flour in a recipe	Pancakes, crêpes and dark cakes. Naturally gluten-free despite the name, but heavier and darker.
Ground almonds	Replace a quarter of the blend	Moister, richer cakes with less carbohydrate. Not nut-free.
Certified gluten-free oat flour	Up to a third of the blend	Adds softness and fibre. Only for people who tolerate oats: a minority of coeliacs react to them.

How to store gluten-free flour

Keep it sealed, cool and dry. Plain starch-based blends last until the date on the pack, but once opened most keep their best quality for about three to six months. Blends with nut, buckwheat or wholegrain flours contain more oil and go stale sooner, so keep those in the fridge or freezer. Old flour smells musty, sour or like paint. It is not usually dangerous, but your bake will taste of it.

What to look for when buying gluten-free flour

Read the ingredients list as well as the logo. Look for three things: a "gluten-free" claim or the Crossed Grain symbol; whether xanthan gum is already in, so you do not double it; and any extras you avoid, such as almond, soya, lupin or Codex wheat starch. A widely sold UK plain blend lists rice, potato, tapioca, maize and buckwheat, which is a good "plain" baseline to compare others with. Compare price per kilo, as small packs of branded "1 to 1" flour can cost several times more than mixing your own.

Side effects and who should be careful

For coeliacs, the risk is not the flour itself but cross-contact, from loose bins, shared scoops or a kitchen that also uses wheat. Rice-based products add to arsenic intake when they are eaten several times a day. Consumer Reports testing found much lower inorganic arsenic in buckwheat, millet, amaranth and polenta, so rotating flours is sensible, especially for children on a gluten-free diet.

Where gluten-free flour comes from

Wheat-free flours are old: rice, maize, buckwheat and cassava flours have been staple foods for centuries. The ready-mixed "gluten-free plain flour" on supermarket shelves is newer. It grew with coeliac diagnosis and with labelling law: since January 2012, foods in the UK and EU can only say "gluten-free" if they contain 20 parts per million of gluten or less, a limit based on the 2008 Codex standard.

Questions about gluten-free flour

Does gluten-free flour have fewer calories than normal flour?

No. White rice flour has about 366 kcal per 100 g and white wheat flour about 364 kcal, according to USDA data. Gluten-free flour has less protein, about 6 g per 100 g compared with 10 g.

Does gluten-free flour contain wheat?

Usually not, but it can. In the UK, gluten-free wheat starch (Codex wheat starch) is allowed in foods labelled gluten-free if gluten stays at 20 ppm or less. It must be named in the ingredients list, so check if you avoid all wheat.

Can I use gluten-free flour to thicken gravy or make a roux?

Yes. Use slightly less than you would of wheat flour, add it gradually and keep the roux light, because it thickens quickly. For sauces that will be baked again, potato or tapioca starch holds up better.

Will gluten-free flour rise with yeast?

Yeast still ferments it, but without gluten the dough cannot trap the gas well. Gluten-free bread needs a binder such as xanthan gum or psyllium husk, and a batter-like dough.

Sources

Last fact-checked 14 November 2026.

General information only, not medical advice. If you have an allergy or a health condition, check with your doctor or dietitian.