Ingredient

Almond flour

Ground blanched almonds, and nothing else. It has no gluten and no starch, so it cannot be swapped one-for-one into a bread or a pastry that relies on structure — it works where the fat and eggs do the holding, as in a frangipane or a macaron.

Sourcing
Sold as almond flour or ground almonds; flour is milled finer, which matters for macarons and little else. Bulk bags from a health-food shop are much cheaper than baking-aisle boxes.
Varieties
Blanched almond flour, Ground almonds (with skins)
Quality cues
Pale cream, loose and sandy. Grey tinges or a clumped, oily texture mean it is old.
Substitutions
Ground hazelnuts, Desiccated coconut, finely ground
Storage
Airtight in the fridge or freezer — it has all the fat of a nut and none of the protective skin, so it turns faster than almost anything else in a baking cupboard.
Shelf life
3 months at room temperature, 6-12 months refrigerated or frozen
Nutrition

Per 100 g

Calories
379 kcal
Protein
7.8 g
Fat
4.9 g
Carbs
77.3 g
Fibre
6.1 g
Sugars
20.3 g
Sodium
453 mg

From USDA FoodData Central (#171680). Raw, edible portion.