- 1 tablespoon butter
- 1 (1 ounce) square semisweet baking chocolate
- 1/3 cup hot water
- 1 cup white sugar
- 2 tablespoons corn syrup
- 1/2 teaspoon pure vanilla extract
- 1/2 teaspoon salt
- Melt butter in a saucepan over low heat. Add chocolate to butter; cook and stir until chocolate melts completely into the butter and the color is consistent, about 5 minutes.
- Slowly stream hot water into the chocolate mixture while stirring continually; add sugar and corn syrup. Continue to cook and stir until the sugar dissolves completely into the liquid, about 10 minutes.
- Remove saucepan from heat and stir vanilla extract and salt into the sauce.