WHOLEMEAL, WHEATMEAL AND BROWN FLOURS All of these flours contain more of the bran and wheatgerm, between 80 and 90 per cent of the grain which gives them a nutty flavour and coarse texture, and a darker colour than white flour. Because of this, they are not usually chosen for making sauces, but if you don't mind the texture and colour, there's no reason why any of these flours should not be used for thickening sauces. The bonus is that they will add a little extra dietary fibre and nutrients to the dish.