Preheat oven to 350 degrees. Mix all ingredients in medium bowl. Press crust mixture onto bottom of 9-inch spring form pan with 2 3/4 inches high on the sides. Bake crust until firm, about 8 minutes. Transfer pan to rack and cool crust completely.
Mix ice cream, kahlua in large bowl. Mix in heath bars, saving several tablespoons for garnish. Pour ice cream into crust, smooth top, freeze until firm, about four hours. Can be prepared 2 days ahead covered.
Using small knife cut around side of pan to loosen torte. Remove pan sides, sprinkle saved crushed heath bar on top. Let torte stand 3 to 5 minutes. Cut into wedges and serve with hot fudge sauce.
Hot Fudge Sauce:
Combine chopped dark chocolate with butter, sugar, heavy cream, and hot water. Melt mixture stirring, at low heat for five minutes. Remove from heat, add vanilla and salt and serve warm.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.