Heat 3 to 4 qt saucepan to medium, add butter, salt, and pepper. Heat until butter is melted

Add flour and whisk until smooth

Slowly pour in milk and whisk until smooth

Add grated cheese and whisk well to incorporate

Turn up the heat to medium high and cook, stirring occasionally, until thick. You can thin with a little more milk if needed

Taste. If you want, you can more grated cheese or add the chicken bouillon to pump-up the taste for a chicken-based dish. Stir well to incorporate.