1/4 c. butter
1/4 c. flour
3 c. milk or half and half
Salt
White pepper

Melt butter. Stir in flour. Stir over low heat until flour is pale gold. Gradually stir in milk and continue to cook until sauce simmers and thickens. Cook until sauce is reduced to 2 cups (30 to 40 minutes) stirring frequently. Season with salt and pepper to taste. Great over tortellini!