Old-Fashioned Mocha Hot Fudge Sauce

Name: Old-Fashioned Mocha Hot Fudge Sauce
Yield: makes about 3 1/4 cups Servings
Ingredients: 1/2 cup unsweetened cocoa powder; 1/2 cup heavy whipping cream; 1/4 cup coarsely ground coffee beans; 1 1/3 cups sugar; 1 cup light corn syrup; 1/4 cup water; 4 ounces unsweetened chocolate, finely chopped; 1/4 cup (1/2 stick) unsalted butter, diced; 2 teaspoons vanilla extract