Melt 2 T butter in a sauce pan. Put in 2 T self-rising flour. Cook a couple minutes. Do not let brown. Add Salt and pepper. Pour 1 c milk into sauce pan and whisk until smooth. Bring to a boil, then reduce and simmer until thick. Sprinkle in salt and pepper. Taste and adjust seasoning.
For a Cheese Sauce just add 2 cups shredded cheese (your favorite flavor) and stir until cheese is melted.
Melt butter, add flour and cook 2 minutes.
Add milk and bring to a boil.
Add 2 c cheese and stir until melted for Cheese Sauce.