:
50g butter (i used marg, didn't have butter)
2 tbsp plain flour
2 cups milk
1 cup grated cheddar cheese
Heat butter in saucepan over medium heat for 2 mins or until melted and foaming.
Add flour.
Cook, stirring with wooden spoon, for 1 min or until mixture bubbles. Remove from heat.
Slowly add milk, 1/4 cup at a time, stirring constantly to prevent lumps forming.
Return pan to medium heat.
Cook, stirring, for 5 minutes or until sauce boils and thickens. Stir in cheese until smooth, remove from heat.
I followed it all exactly, except after the milk went in it probably took 10 minutes to thicken and boil, not 5. I wasn't timing it, but it sure felt like longer!