Step 1

Melt the butter in a saucepan over a medium heat. Stir in the flour and cook for 1–2 minutes.

Step 2

Take the pan off the heat and gradually stir in one-third of the milk. Return to the heat and simmer, stirring, until all the milk is absorbed. Repeat this process until all the milk has been added.

Step 3

Simmer gently for 5 minutes and season with salt and white pepper.

Step 4

Stir in the parsley and serve.