1/4 c. butter
1/4 c. flour
2 c. milk
1/2 tsp. salt
1/8 tsp. pepper
2 egg yolks
1 tbsp. whipping cream
1/4 c. shredded Swiss cheese

Melt butter in heavy saucepan over low heat. Add flour and stir until smooth. Cook 1 minute, stirring constantly. Gradually add milk; cook over medium heat, stirring constantly, until thick and bubbly. Stir in salt and pepper. Beat egg yolks until thick and lemon-colored; stir in whipping cream. Gradually stir about 1/4 hot mixture into yolks; add to remaining hot mixture and cook, stirring constantly, until thickened (about 2-3 minutes). Add cheese; stir until melted.