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A new article about Cast Iron Skillet Culinaire and how it all got started.

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Each Mother Sauce produces two to three secondary sauces and host of derivitive sauces.
The key to developing rich sauces is in mastering the art of making a Roux.
Over-hydrated or thin sauces can be saved by making "slurry"; part cool sauce or liquid plus starch for thickening.