Sauce Espagnole (Brown Mother Sauce)

January 18, 2009

Sauce Espagnole (Brown Mother Sauce) - kvalifood.com

Makes ca. 750 mL / 3 cups - about 6 servings

Ingredients

Brown roux

45 g (3 tbsp) clarified butter or unsalted butter
45 g all-purpose flour

Sauce

1.25 L brown beef (or veal) stock, warm
25 g smoked pork belly (or unsmoked bacon), cut into small cubes
1 medium onion (100 g), roughly chopped
1 medium carrot (100 g), roughly chopped
1 celery rib (50 g), roughly chopped
30 g (2 tbsp) tomato paste
15 g (1 tbsp) unsalted butter (for sweating)

Bouquet garni

2 sprigs fresh thyme
4-6 parsley stems
1 bay leaf
1/4 tsp whole black peppercorns
1 garlic clove, halved (optional)

Directions

Prepare the roux separately. In a small heavy-bottomed saucepan, melt 45 g clarified butter over medium heat. Add 45 g flour and stir constantly with a wooden spoon. Cook 8-12 minutes until the roux reaches a deep brown color (darker than peanut butter, with a nutty aroma). Remove from heat and set aside.
Sweat the mirepoix. In a large heavy-bottomed pot, melt 15 g butter over medium heat. Add the pork belly cubes and cook 3-4 minutes until they begin to render fat. Add onion, carrot, and celery. Cook 8-10 minutes, stirring occasionally, until vegetables are lightly browned.
Pince the tomato paste. Add the tomato paste to the vegetables and stir well. Cook 5-8 minutes, stirring frequently, until the paste darkens to a rust color. This removes raw acidity and deepens flavor.
Add the stock. Pour in the warm brown stock gradually, stirring to deglaze the pot. Bring to a simmer.
Add the roux. Whisk the reserved brown roux into the simmering stock a spoonful at a time, ensuring each addition is fully incorporated before adding more. This prevents lumps.
Add the bouquet garni. Tie thyme, parsley stems, bay leaf, and peppercorns in cheesecloth (add garlic if using). Submerge in the sauce.
Simmer and skim. Reduce heat to a gentle simmer. Cook uncovered for 1.5-2 hours, skimming fat and impurities from the surface every 20-30 minutes. The sauce should reduce by roughly one-third to one-half.
Strain. Remove the bouquet garni. Strain the sauce through a fine-mesh sieve (or cheesecloth-lined sieve for extra smoothness), pressing lightly on the solids. Discard solids.
Season and store. Taste and adjust salt. Use immediately as a base for derivative sauces, or cool and refrigerate (up to 3 days) or freeze (up to 3 months).

Notes

Stock quality matters most. A well-made brown veal or beef stock is 90% of this sauce’s flavor. Homemade is strongly preferred; commercial stock will produce a noticeably weaker result.
Veal stock is the classical choice and produces a more refined, gelatinous sauce. Beef stock works but is heavier. A blend of both is a good compromise.
The roux should be dark brown, not burnt. If it smells acrid or has black specks, discard and start over. A proper brown roux smells nutty.
Pork belly is traditional and adds a subtle smoky depth. It can be omitted for a lighter or pork-free version without fundamentally changing the sauce.
This is a base sauce, not a finishing sauce. Use it to make demi-glace (reduce espagnole with equal parts brown stock by half) or derivative sauces like bordelaise, chasseur, Robert, or bigarade.
Skimming is essential. The long simmer draws out impurities and fat. Skimming every 20-30 minutes keeps the sauce clean-tasting.