Espagnole: The French Mother Sauce You May Not Be Familiar With
By C.A. Pinkham
If you've ever had a beef-based sauce like a demi-glace, you've likely experienced espagnole sauce. It's a savory, brown, French mother sauce with a deep, rich, beefy flavor.
Espagnole starts with cooking carrots and onions in butter, followed by making a brown roux with flour, then adding beef or veal stock, tomato puree, celery, garlic, and herbs.
The sauce is whisked continuously, reduced until it coats the back of a spoon, and then strained to remove the solids. It's typically served with dark meat, specifically red meat.
While it's considered a French mother sauce, it may actually originate from Spain — hence the name: "espagnole," which is the French word for "Spanish."
One theory suggests that French chefs added tomato to a brown sauce, thus making it "Spanish," for Louis XIII's wedding to Anne of Austria, but there's no definitive answer.