3/4 cup sugar
1/3 cup cocoa powder
3 tablespoons cornstarch
1/2 cup water
1/4 light corn syrup
1/4 cup butter
1 tsp. vanilla

Combine sugar, cocoa and cornstarch in small saucepan. Stir in the water and corn syrup and cook over medium heat, stirring constantly until it comes to a boil. Reduce heat to low and boil for 5 more minutes. Remove from heat and add the butter and vanilla. Stir until butter is completely mixed in. This is best when served warm.

Makes about 1 1/2 cups of sauce.