A guide to British flour types and their uses

Why the flour you choose matters

Walk down any British supermarket baking aisle and you will find a wall of paper bags that all look more or less the same. They are not. Flour is the quiet engine of everything we bake, and the difference between a light, feathery sponge and a brick lies mostly in how much protein that flour contains and how the wheat was milled. Protein builds gluten, gluten builds structure, and structure is either your best friend or your worst enemy depending on what is in the oven.

Choosing well is not complicated. A handful of flours cover almost everything a home baker in the UK is likely to make, and once you know what each one is for, a recipe stops being a gamble.

Plain flour: the all-rounder

Plain flour is milled from softer wheats and sits at roughly 9–11% protein. Those weaker proteins form short gluten strands, which is precisely what you want for anything that should be tender rather than chewy. If you keep only one bag in the cupboard, make it this one.

• Shortcrust and sweet pastry — the classic choice, rubbed into cold butter until it looks like fine breadcrumbs
• Scones, biscuits and shortbread — a light hand and a low-protein flour give that short, crumbly snap
• Victoria sponges and fruit cakes — creamed with butter and sugar, plain flour keeps the crumb soft
• Yorkshire puddings and batters — a thin, lump-free batter that rises hard in hot fat
• Roux for sauces and gravies — equal weights of flour and butter, cooked out properly

One caveat: plain flour is not bread flour. Try to bake a crusty cob with it and you will get a dense, sad loaf that proves sluggishly and bakes flat.

Self-raising flour and the baking powder question

Self-raising flour is simply plain flour with a raising agent blended in — typically around one teaspoon of baking powder per 100g, plus a little salt. It is the flour of British teatime: fairy cakes, rock cakes, sponge puddings, scones where you want a little extra lift.

Two things to know. First, that raising agent loses strength over time, so check the date and keep the bag sealed and dry. Second, you can make your own in seconds: for every 100g of plain flour, whisk through one teaspoon of baking powder. If a recipe calls for self-raising and you only have plain, that substitution will save the day.

Do not use self-raising flour in bread. The extra lift fights the yeast and gives an odd, crumbly texture.

Strong flour: the backbone of British bread

Strong bread flour is milled from hard wheats and lands at 12–14% protein, giving the long, elastic gluten needed to trap steam and hold a proper open crumb. This is the flour for bloomers, tin loaves, cobs, focaccia and pizza bases.

• Everyday white bread — strong white, yeast, salt, water, and time
• Enriched doughs — brioche, Chelsea buns and hot cross buns, where butter and sugar need a sturdy frame
• Very strong flour (14%+) — worth seeking out for bagels, chewy pizza and long-proved sourdough
• Flaky and rough puff pastry — a little strong flour in the mix helps the layers hold

If you bake bread often, buy strong flour in larger bags. It is cheaper, and it keeps well in a cool, dark cupboard.

Wholemeal, brown and heritage grains

Wholemeal flour includes the bran, germ and endosperm, so it absorbs considerably more water than white — expect to add 10–15% extra liquid and to rest the dough longer. Bran also cuts through gluten, so wholemeal loaves rise less dramatically and taste nuttier, earthier and faintly sweet. A good compromise is half wholemeal, half strong white.

Brown flour sits between the two: some bran removed, more flavour than white, easier to handle than full wholemeal. Beyond that, heritage grains are having a proper revival in Britain, and rightly so:

• Spelt — nutty and delicate, with fragile gluten; knead less and prove gently
• Rye — low gluten, dense and sour-sweet; brilliant in small proportions alongside wheat
• Einkorn and emmer — ancient wheats with a grassy, buttery flavour and very weak gluten; best blended
• Heritage wheat varieties such as Maris Widgeon — grown for flavour rather than yield, and lovely in a slow-proved loaf

These flours are thirstier and less forgiving, so start by swapping in just a quarter of your usual flour and see how the dough feels.

Specialist flours, thickening and storage

A few extras earn their shelf space. 00 flour, finely milled and lower in protein, makes silky pasta and delicate pastry. Semolina is for dusting peels and trays, and for a crisp base under a pizza. Cornflour thickens without clouding — whisk a tablespoon with cold water and stir it in at the end of cooking, where a flour roux would need longer to lose its raw taste.

For gravies and casseroles, plain flour is the traditional thickener; wholemeal works too but leaves a speckled, nutty sauce. Always cook flour out for at least a minute before adding liquid, or you will taste it.

Store everything in airtight containers in a cool, dark place. White flours last many months; wholemeal and heritage flours contain oils in the germ and turn stale faster, so buy in smaller quantities or keep them in the freezer and bring to room temperature before baking. Treat flour as an ingredient rather than a background, and your baking will improve overnight.