Flours in this category are very smooth and fine, and will mix with a liquid without producing almost any lumps.
As a general summary, this type of flour includes those flours for cakes, crêpes, pastries, sauces and waffles.
In this category, the following flours are considered “farines supérieures” or “de luxe” (“farines supérieures” are always Type 45 flours.)
Farine de gruau
This is the finest wheat flour, made from soft wheat with 11% gluten. It can be used for raised pastry doughs, brioches, flaky pastries, sweet rolls, etc. It rises well.
Tamisée means “sifted.” It is also referred to as “fluide” or “extra-fluide.” It is good for thickening sauces and making crêpes.
Farine à gâteaux
Cake flour. Can be used for cakes, brownies, pizzas, etc.
Farine avec poudre levante
This is self-rising flour, meaning it has baking powder in it. Can be used for cakes, brownies, pizzas, etc.
Pastry flour. It is somewhat higher in gluten than cake flour. Rises well.
You can substitute Type 55 or all-purpose flour or plain flour, just sift well. Many French usually make an effort to buy a Type 45, though, for brioche and flaky pastry.