Instructions: Combine sugar, 3 1/2 cups water, and salt in a large saucepan. Bring mixture to a boil and stir until sugar is dissolved completely. Whisk in cocoa powder.

Remove saucepan from heat; stir in coffee; let mixture cool slightly; add rum. Pour mixture into a large stainless-steel mixing bowl and chill thoroughly.

Freeze mixture in ice cream maker, following manufacturers directions.

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