Step 1

Melt the butter in a large saucepan over medium heat.  Whisk in the flour and continue whisking for approximately 1 minute until a thick paste is formed.

Step 2

Then gradually whisk in the milk and cook uncovered until the mixture has thickened.

Step 3

Remove the pan from the heat and then whisk in the cheddar cheese and salt. Whisk until the cheese is melted and the mixture is smooth.

Step 4

Serve immediately and store leftovers in an air tight container in the refrigerator for up to one week.