I was taught the following ratios for what my father called "white sauce:"
1 T. butter, 1 T. flour, 1 cup milk = thin white sauce
2 T. butter, 2 T. flour, 1 cup milk = medium white sauce
3 T. butter, 3 T. flour, 1 cup milk = thick white sauce
I, too, am usually impatient adding cold milk so the...