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Method

  • STEP 1

    Pour 500ml milk into a large saucepan and add 4 tbsp plain flour and 50g butter.

  • STEP 2

    Turn on the heat to medium and start to whisk the mixture. Keep whisking fast as the butter melts and the mixture comes to the boil – the flour will disappear and the sauce will begin to thicken.

  • STEP 3

    Whisk for another 2 mins while the sauce bubbles then stir in 100g grated strong cheddar cheese (or 50g grated cheddar, 50g crumbled blue cheese) until melted.