Edith May Bertels Thomas, Mary at the Farm and Book of Recipes Compiled During Her Visit Among the "Pennsylvania Germans"
“ After cooking vegetables until tender in salted water, they should be drained and served with a cream sauce poured over. The art of making a smooth, creamy sauce of the proper consistency is easily acquired. A good rule for "common cream sauce" is 1 cup of milk, water, or meat broth, thickened with 1 tablespoonful to 11⁄2 tablespoonfuls of flour, or a combination of flour and cornstarch. Mix flour, or cornstarch, with a small quantity of cold milk or water, to a smooth paste, before adding it to liquid; add, usually, one tablespoonful of butter. ”
