Ingredient

All-purpose flour

Plain flour sits in the middle of the protein range — enough gluten for a pastry to hold, not enough for a loaf to rise properly. Measuring it by volume is the single largest source of error in home baking; a cup can vary by 20% depending on how it is scooped.

Sourcing
British plain flour is roughly equivalent to American all-purpose, though slightly lower in protein. Weigh rather than scoop wherever a recipe gives grams.
Varieties
Plain/all-purpose, Self-raising, Type 00, Wholemeal, Spelt
Quality cues
Should smell faintly sweet. Musty or sour smells mean the wheat oils have turned.
Substitutions
Bread flour (chewier result), Self-raising flour (omit the raising agents)
Storage
Airtight in a cool cupboard. Freezing a new bag for 48 hours kills any weevil eggs, which is worth doing if you have had them before.
Shelf life
6-12 months; wholemeal 3 months, or a year frozen
Nutrition

Per 100 g

Calories
364 kcal
Protein
10.3 g
Fat
1 g
Carbs
76.3 g
Fibre
2.7 g
Sugars
0.3 g
Sodium
2 mg

From USDA FoodData Central (#169761). Raw, edible portion.

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