The Book of Household Management by Mrs. Beeton

525. INGREDIENTS.--6 oz. of butter, 9 oz. of flour.

_Mode_.--Melt the butter in a stewpan over a slow fire, and dredge in, very gradually, the flour; stir it till of a light-brown colour--to obtain this do it very slowly, otherwise the flour will burn and impart a bitter taste to the sauce it is mixed with. Pour it in a jar, and keep it for use: it will remain good some time. _Time_.--About 1/2 hour. _Average cost_, 7d. WHITE ROUX, for thickening White Sauces.