Melt the butter in a saucepan, add the flour and stir until smooth. Pour in milk in sips, stirring constantly with a whisk so that no lumps can form. After all the milk is in the pot, add the previously roughly crumbled cheddar cheese. Stir constantly, bring to the boil until a bond has formed. Season with a little pepper and cayenne powder, salt.

Good for cheese macaroni or tortilla chips as a dip.