In food processor, place chocolate chips; cover and process until finely ground. In 1-quart saucepan, heat 1/3 cup of the 1 1/3 cups whipping cream and the granulated sugar over medium heat, stirring constantly, until sugar is dissolved and mixture is boiling. With food processor running, pour hot whipping cream through feed tube; process 10 to 20 seconds or until chocolate is completely melted. Scrape down sides of bowl. Add 1/2 cup liqueur, the oil and 1 tablespoon vanilla through feed tube; process 10 to 20 seconds or until creamy. Pour into large bowl; cool about 5 minutes or until room temperature.