Brown Sugar Rum Coffee Mousse
1.
Stir the rum into the hot coffee and let it cool. Put the metal bowl containing the egg yolk and brown sugar in a bowl of boiling water and stir thoroughly until the mixture becomes viscous, turn off the heat to cool, and stir into the coffee
2.
Rinse 4 glasses with cold water and pour the coffee mixture. Put the glass in the refrigerator to cool for at least 1 hour, until the mousse is jelly formed. Sprinkle cocoa powder before serving
3.
20 minutes preparation time + 1 hour freezing time