Equipment
Ingredients
Roux Base
- 50 g unsalted butter, cubed
- 50 g all-purpose flour, sifted
Liquid and Seasoning
- 500 ml whole milk, warmed
- 2 g fine sea salt
- ½ g ground nutmeg
- ½ g white pepper
Nutrition (per serving)
Nutrition is estimated per serving. Nutrients without complete source data are omitted.
Full nutrition
- Calories
- 212 kcal
- Protein
- 5 g
- Carbohydrates
- 16 g
- Fat
- 14 g
- Fiber
- 0 g
- Sugar
- 6 g
- Sodium
- 249 mg
- Saturated Fat
- 9 g
- Monounsaturated Fat
- 4 g
- Polyunsaturated Fat
- 1 g
- Cholesterol
- 39 mg
- Potassium
- 182 mg
- Calcium
- 147 mg
- Iron
- 0.2 mg
- Magnesium
- 16 mg
- Phosphorus
- 122 mg
- Zinc
- 0.6 mg
- Vitamin A
- 143 mcg
- Vitamin C
- 0 mg
- Vitamin D
- 1.6 mcg
- Vitamin E
- 0.4 mg
- Vitamin K
- 1 mcg
- Vitamin B6
- 0.1 mg
- Vitamin B12
- 0.6 mcg
- Thiamin
- 0.08 mg
- Riboflavin
- 0.22 mg
- Niacin
- 0.3 mg
- Folate
- 10 mcg
- Water
- 114 g
Sources: USDA FoodData Central
Method
Place the saucepan over medium-low heat and melt the butter completely, being careful not to let it brown.
Add the flour all at once and whisk continuously for 2 minutes. The mixture should bubble gently and smell slightly nutty, but remain pale in color. This forms the white roux.
While whisking vigorously, pour in a splash of the warm milk (about 50ml). The roux will immediately seize and thicken. Continue adding the milk in small increments, whisking until smooth before adding the next splash.
Once all the milk is incorporated, increase the heat slightly to bring the mixture to a gentle simmer around 85C or 185F. Cook for 5 to 7 minutes, stirring frequently and scraping the bottom and corners of the pan to prevent scorching.
Remove the saucepan from the heat. Whisk in the sea salt, ground nutmeg, and white pepper. Taste and adjust the seasoning if necessary.
Chef's Notes
- Equal parts fat and flour by weight is the golden ratio for a classic roux. Measuring by volume (cups) often leads to incorrect ratios and inconsistent thickness.
- Traditional French kitchens often infuse the milk with a studded onion (oignon piqué - a peeled onion half with a bay leaf tacked on by whole cloves) before adding it to the roux for greater depth of flavor.
- To transition this into a Mornay sauce, simply whisk in 100g of grated Gruyère and 50g of Parmesan cheese off the heat once the béchamel is finished.
- White pepper is traditionally used to maintain the pristine white color of the sauce, but black pepper provides a sharper, arguably superior flavor if you do not mind the black specks.
Storage
Refrigerator: 4 days — Press a piece of plastic wrap or parchment paper directly against the surface of the sauce to prevent a rubbery skin from forming as it cools.
Freezer: 3 months — The sauce may separate and look grainy when thawed. It is safe to eat.
Reheating: Warm gently in a saucepan over low heat, whisking vigorously to re-emulsify. If it is too thick or split, whisk in a tablespoon of cold milk until smooth.
Troubleshooting
Sauce is lumpy and textured
Cause: Milk was added too quickly or was too cold, or the sauce was not whisked thoroughly enough
Fix: Pass the sauce through a fine mesh sieve, or use an immersion blender to smooth it out before finishing
Prevention: Warm the milk before adding and pour it in very gradual stages while whisking vigorously
Sauce tastes like raw flour or dough
Cause: The roux was not cooked long enough before the milk was added
Fix: Simmer the sauce on very low heat for an additional 10 minutes, whisking often, adding a splash of milk if it over-thickens
Prevention: Ensure the butter and flour mixture cooks for at least 2 full minutes until it bubbles and smells toasty
A thick, rubbery skin formed on top
Cause: Sauce was left exposed to air while cooling
Fix: Skim the skin off and discard it. Do not whisk it back in or the sauce will become lumpy
Prevention: Cover immediately with a cartouche (parchment paper) or plastic wrap touching the surface
Cultural Context
Béchamel is famously known as one of the five grand mother sauces of French cuisine, as classified by Auguste Escoffier in the early 20th century. Originally created in 17th-century France and named after Louis de Béchameil, a financier and honorary chief steward to King Louis XIV, it has since become an indispensable culinary cornerstone globally. It acts as the structural foundation for Greek pastitsio, Italian lasagna al forno, and American macaroni and cheese.
