Soluzione per Il Cappuccino Mistero

Wikipedia says: Cappuccino is an espresso-based coffee drink that is traditionally prepared with steamed milk including a layer of milk foam. Variations of the drink involve the use of cream instead of milk, using non-dairy milk substitutes and flavoring with cocoa powder or cinnamon.

Brack’s cappuccino indeed had a layer of foamed milk topped by a dusting of cocoa powder. Each time Brack took a swallow of the drink, the level in the cup dropped, leaving behind a little ring of cocoa-dusted foam.