Béchamel sauce

  • 35 min
  • Prep 5 min
  • Cook 20 min
  • About 600 ml
  • easy

The classic French white sauce of butter, flour and milk infused with bay and onion, cooked until smooth and lightly seasoned with nutmeg.

Method

  1. 1

    Heat the milk with the bay leaf and onion in a saucepan until small bubbles appear around the edge.

  2. 2

    Take it off the heat and leave to infuse.

  3. 3

    Strain the milk into a jug and discard the bay leaf and onion.

  4. 4

    Melt the butter in a clean saucepan over medium-low heat until it foams.

  5. 5

    Add the flour and stir constantly to make a smooth paste, cooking until it smells biscuity but stays pale.

  6. 6

    Take the pan off the heat and whisk in a quarter of the warm milk until smooth.

  7. 7

    Return to the heat and whisk in the rest of the milk gradually, keeping the sauce smooth.

  8. 8

    Bring to a gentle simmer, whisking, until the sauce thickens enough to coat the back of a spoon.

  9. 9

    Simmer over low heat, stirring often, to cook out the floury taste.

  10. 10

    Season with nutmeg, salt and white pepper, and use straight away.

Notes

  • Adding the milk gradually and off the heat at first is what keeps the sauce free of lumps. If lumps do form, whisk hard or pass the sauce through a sieve.
  • To store, press baking paper onto the surface to stop a skin forming. Reheat gently with a splash of milk.
  • For a thicker sauce for lasagne or croquettes, use 60 g each of butter and flour. Stir in grated cheese off the heat to make a Mornay sauce.

Equipment

2 medium saucepans, Whisk, Wooden spoon, Fine sieve

Cook this step by step