White cheese sauces are very popular in Springfield in the last few years.  Here is an easy to make variation using shredded white cheddar.

2 T butter
2 T all-purpose flour
1/4 t salt
1/8 t white pepper
1 c milk
1 C white cheddar cheese, shredded

In a medium saucepan, melt butter and stir in flour to make a roux.  Stir in milk, salt, and pepper.  Cook over medium heat, stirring constantly until sauce thickens.  Add cheese and cook just until melted, stirring occasionally.