Heat the cream, zest and butter until just starting to simmer. You can do this on the stovetop or in the microwave. Pour over the chocolate, add the coffee and salt, and stir until smooth. Scrape into a shallow bowl, cover and chill in the fridge until firm enough to shape into balls (see visual guide in the dark chocolate truffles recipe in the archive).
Using a teaspoon, scrape the chocolate to form one-inch balls. You should be able to make about eight balls. Roll half of the balls in powdered sugar and half in cocoa powder. Keep chilled until serving time.
Dark chocolate and orange truffles printed from https://casaveneracion.com/dark-chocolate-orange-truffles/ for personal use only. Not for republication nor distribution.