• 1/2 cup all purpose flour 
• 1/3 cup sugar 
• 1/2 teaspoon salt 
• 1 1/2 cups milk 
• 2 egg yolks 
• 2 tablespoons butter 
• 1 1/2 teaspoons vanilla 
• 1/4 cup whipping cream 

Stir flour, sugar and salt together. 
Scald milk in top of double boiler. 
Add the hot milk to dry ingredients, a little at a time, stirring between additions; mix well and return to double boiler. 
Cook until thickened, stirring constantly. 
Cover and cook 20 minutes longer. 
Beat egg yolks slightly, add a little of the hot mixture to them, mixing well. 
Return to double boiler and stir for 2 minutes. 
Remove from heat; add butter, vanilla and cream. 
Cool before using. 

Yield: enough filling for large layer cake or 2 dozen medium size eclairs.