Add hot water to a mug, cup or large glass. Let it sit for about 10 min. to preheat the mug.

In the meantime, brew a cup of strong coffee and heat the rum. Make sure to don´t boil it.

Whip the heavy whipping cream. Traditionally there is no sugar added but you can sweeten it to your taste.

Empty the water from the mug and place the sugar cube into it.

Pour in the warm rum and hot coffee.

Garnish with a generous amount of whipped cream.