
How to Make a Roux: Ratios, Colors, and Sauce Math
Make roux with equal weights of fat and flour. For about 2 cups (475 mL) of medium-thick sauce, start with 30 g butter and 30 g all-purpose flour.
Sauce work is where restaurant food most obviously outpaces home cooking, and almost all of it comes down to a handful of master methods: deglaze and reduce, thicken with roux or reduction, finish with fat. This collection teaches those methods as frameworks with ratios and stages, so one technique becomes a hundred sauces instead of a hundred separate recipes.
Everything here is measured and tested for internal consistency — reduction volumes, butter-to-liquid ratios for mounting, and the temperatures at which emulsions hold or break. Where a professional step doesn't survive the trip home (a two-day veal stock, for instance), we say so and give the honest substitute.


Make roux with equal weights of fat and flour. For about 2 cups (475 mL) of medium-thick sauce, start with 30 g butter and 30 g all-purpose flour.

To make a pan sauce, sear meat in a stainless or cast iron pan, remove it to rest, and pour off all but a tablespoon of fat.