|All purpose flour||4 Tablespoon|
|Milk||2 Cup (32 tbs)|
|White pepper||1⁄4 Teaspoon|
|Worcestershire sauce||1 Teaspoon|
|Parmesan cheese||1⁄3 Cup (5.33 tbs), grated|
Melt butter over medium heat in a heavy saucepan.
Cook, stirring constantly, 4 to 5 minutes.
Still stirring, preferably with a whisk or a wooden spoon, slowly pour in the milk.
Simmer sauce 20 to 25 minutes, stirring occasionally to prevent scorching.
Season with salt and pepper, add Worcestershire and grated cheese.
Simmer 5 minutes longer, stirring frequently.
If completed sauce is thicker than desired, thin out with small additions of milk.