Copycat Chocolate Fudge Sauce

This is the recipe refered to in the Calypso Pie Recipe a.k.a. The Keg's Billy Miner Pie.

Copycat Chocolate Fudge Sauce

Ingredients:

1/2 cup granulated sugar
2 tablespoons cocoa
1/3 cup milk
1/4 cup light corn syrup
1 ounce unsweetened chocolate
2 tablespoons butter
1/3 cup heavy cream 1 teaspoon vanilla extract

Instructions:

In a heavy saucepan, stir together sugar and cocoa. Add milk and syrup and stir until blended. Stirring constantly, bring to a boil; continue stirring and boiling for 8 minutes. Remove from heat; add chocolate and butter and stir until melted, then add the cream. Return to the heat and boil an additional 2 minutes, stirring constantly. Remove from heat and add vanilla. Cool; store in the refrigerator in a jar with a tight-fitting lid. To serve, uncover and heat the jar in a saucepan of warm water for a few minutes (or in the microwave for 20 to 30 seconds).