Almond flour is made from ground almonds that have first been blanched to remove the skins.

Almond flour is protein-rich, high in manganese, Vitamin E and monounsaturated fats, low in carbohydrates, and it also contains fiber.  Almond flour may be better for your blood sugar, because of its low glycemic index and also for its high level of magnesium.

Recipes that call for almond flour will generally have more raising agent than other recipes to account for the weight of almond flour.  Make sure to keep this in mind when substituting almond flour for other flours in baking recipes.