Hot Fudge Sauce - cooking recipe

Ingredients

1 can Hershey's chocolate syrup
1 can Eagle Brand condensed milk
1 1/2 tsp. vanilla
1/4 tsp. salt
1 stick butter

Preparation

Heat chocolate syrup in heavy pan over medium heat until it reaches the boiling stage.
Let it almost come up to a rolling boil.
Add vanilla and salt, then add condensed milk, stirring very rapidly as it is poured in.
Immediately reduce heat to low; continue to stir constantly until well emulsified.
Do not remove from low temperature for several minutes.
It will get thick and creamy.
Remove from heat; stir occasionally.
Keep warm.