|Brown sugar||1 Cup (16 tbs) (firmly packed)|
|All purpose flour||3 Tablespoon|
|Evaporated milk||1 Cup (16 tbs)|
|Egg yolks||2 , slightly beaten|
|Butter/Margarine||2 Tablespoon, softened|
Combine sugar and flour in a saucepan; gradually stir in milk.
Cook over medium heat, stirring constantly, until mixture thickens and boils.
Boil 1 minute, stirring constantly; remove from heat Gradually stir about one-fourth of hot mixture into yolks; add to remaining hot mixture, stirring constantly.
Return to a boil and boil 1 minute, stirring constantly.
Remove from heat; add butter, stirring until butter melts.