|All purpose flour||2 Tablespoon|
|Milk||1 Cup (16 tbs)|
|Pepper white||1⁄8 Teaspoon|
|Whipping cream||1 1⁄2 Teaspoon|
|Shredded swiss cheese||1⁄4 Cup (4 tbs)|
Melt butter in a heavy 2-quart saucepan over low heat; add flour, stirring until smooth.
Cook 1 minute, stirring constantly.
Gradually add milk; cook over medium heat, stirring constantly, until mixture is thickened and bubbly.
Stir in salt and pepper.
Beat egg yolk until thick and lemon colored; stir in whipping cream.
Gradually stir about one-fourth of hot mixture into yolk; add to remaining hot mixture, stirring constantly.
Cook over medium heat about 2 to 3 minutes, stirring constantly, until mixture is thickened.
Add cheese, and stir until melted.
Remove sauce from heat