In a medium saucepan over low heat or in the microwave at half-power intervals of 30 seconds until sugar is dissolved.
Combine heavy cream, milk and cocoa powder
whisk to blend. Stir into hot mixture with vanilla extract (and chocolate morsels if using). Allow mixture to cool in refrigerator for at least an hour or preferably until thoroughly cooled.
Process the gelato base according to your ice cream maker's instructions, then freeze as directed. Serve immediately.