In a medium bowl, whisk together the cocoa, sugars, and salt.   Add the milk to the cocoa mixture and whisk together until the cocoa and sugars are dissolved.

Next, add the heavy cream and vanilla.  Stir to combine.  Pour the mixture into the ice cream and churn for 20 minutes or until thick.

Leave the ice cream churning and add the marshmallow fluff a spoonful at a time. Once that is all mixed in add the chopped graham crackers and let mix into the ice cream. Once mixed, you can serve immediately or transfer to a freezer container and freezer for 2 hours or until firm. Makes 1 1/2 qts.