Our all-time favorite recipe for a traditional chocolate ice cream that doubles down on the chocolate flavor, that is why is called The Ultimate Chocolate Chocolate Ice Cream recipe.
Make the ice cream: In a bowl, stir together 1/4 cup milk and the cornstarch; set slurry aside. In a 4-quart saucepan, whisk together remaining milk and the cream, 1/2 cup of the sugar, syrup, and salt; bring to a boil over medium-high heat. Cook for 4 minutes; stir in slurry. Return to a boil and cook, stirring, until thickened, about 2 minutes. Place cream cheese in a bowl and pour in 1/4 cup hot milk mixture; whisk until smooth. Then whisk in remaining milk mixture.
Make the chocolate sauce: Bring cocoa, brewed coffee, and remaining 1/2 cup sugar to a boil in a 2-quart saucepan over high heat; cook for 30 seconds. Remove from heat and stir in chocolate.
Stir sauce into ice cream base. Pour mixture into a gallon plastic bag; seal, and submerge in a bowl of ice water until chilled. Pour mixture into an ice cream maker; process according to manufacturer's instructions. Transfer ice cream to a storage container and freeze until set at least 4 hours.