500ml milk, 4 tbsp plain flour, 50g butter, and 100g grated strong cheddar.
Firstly, pour milk into a large saucepan. After this, add 4 tbsp plain flour and 50g butter.
Now, turn on the heat to a medium flame and start to whisk the mixture. Keep whisking fast as the butter melts and the mixture comes to the boil
After this, whisk for another 2-3 minutes until the sauce bubbles. Stir in 100g grated strong cheddar cheese until melted. Enjoy your Cheese Sauce with tasty sandwiches!