Meals

White Sauce (Bechamel) for Pasta

White sauce (bechamel) for pasta in 20 minutes with 4 ingredients: butter, flour, milk and nutmeg. The step-by-step method for a lump-free sauce.

⏱ Prep 5 min
🔥 Cook 15 min
⏳ Total 20 min
🍽 Yield 4 servings (about 500 ml)
⚡ Calories (approx.) 130 kcal
Difficulty Easy

White sauce, or bechamel, for pasta comes together in 20 minutes with just 4 ingredients: butter, flour, milk and nutmeg. The classic ratio is 50 g butter + 50 g flour per liter of milk; for pasta we use 30 g + 30 g per 500 ml, and the secret to a lump-free sauce is adding cold milk gradually over the hot roux while whisking constantly. It is the sauce behind the classic pasta with white sauce (pasta with bechamel).

Recipe by

Ingredients

Servings
4 servings

Instructions

  1. Melt the butter over medium heat

    Place the 30 g of butter in a small saucepan over medium heat and let it melt completely without browning. If it turns brown, the flavor changes; pull the pan off the heat for a few seconds and lower the temperature.

  2. Add the flour and cook the roux for 2 minutes

    Add the 30 g of flour all at once and stir with a whisk until you get a smooth paste: that is the roux. Cook it for 2 minutes, stirring constantly, to remove the raw flour taste; it should smell faintly of biscuit without taking on color.

  3. Whisk in the cold milk gradually

    Pour in the 500 ml of cold milk in 3 or 4 additions, whisking vigorously after each one until fully incorporated before adding more. This contrast of hot roux and cold milk is what prevents lumps; the most common mistake is dumping in all the milk at once and stopping whisking.

  4. Cook until it thickens (5-8 minutes)

    Raise to medium heat and cook for 5 to 8 minutes, stirring often and scraping the bottom so it does not stick. The sauce is ready when it coats the back of a spoon and running a finger through it leaves a clean trail.

  5. Season with nutmeg, salt and pepper

    Off the heat, add the pinch of nutmeg plus salt and white pepper to taste, and mix well. For a mornay sauce, stir in the 50 g of grated cheese now and mix until melted.

  6. Serve immediately over the pasta

    Toss the sauce with freshly cooked pasta and serve right away: bechamel thickens as it sits. If you need to wait a few minutes, cover it with plastic wrap touching the surface so it does not form a skin, then loosen it with a splash of milk.

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Foodtastico Tip

White sauce keeps for up to 3 days refrigerated in an airtight jar with plastic wrap touching the surface. Reheat over low heat with a splash of milk, whisking until it regains its texture. Do not freeze it: it splits and separates when thawed.

Nutrition information

Calories130 kcal
Protein5 g
Carbs11 g
Sugars6 g
Fat8 g
Trans fat0 g

Values per serving (1 of 4).

Frequently asked questions

How do I make white sauce without lumps?

Three keys: cook the roux (butter + flour) well for 2 minutes, add the cold milk gradually over the hot roux, and whisk constantly after each addition. The common mistake is pouring in all the milk at once and stirring with a spoon: that is where lumps come from.

Are white sauce and bechamel the same thing?

Yes, they are the same preparation. In Chile and Argentina it is called salsa blanca (white sauce), while in Spain and in classic French cooking it is bechamel: a mother sauce made of butter, flour and milk. Pasta with white sauce is simply pasta with bechamel.

Can I make white sauce without butter or with plant-based milk?

Yes. Butter can be replaced with the same amount of olive oil or margarine, and milk with an unsweetened plant-based drink (soy or oat thicken better than almond). The texture is slightly less creamy, but the method is identical.

Can white sauce be frozen?

It is not recommended: when thawed, the milk-and-flour emulsion breaks and the sauce turns grainy and separated. It is better to make it the same day, or refrigerate it for up to 3 days and reheat over low heat with a little extra milk.

How do I fix a white sauce that turned out lumpy or too thick?

If it has lumps, pass it through a fine sieve or blend it for a few seconds with an immersion blender, then reheat gently. If it is too thick, add warm milk a tablespoon at a time while whisking over low heat until you reach the desired texture.

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