Combine the orange zest with the cream in a pan and warm over low heat. Do NOT boil the cream, just warm enough to melt the chocolate.
Pour the warm cream with orange zest into the chocolate and stir until the chocolate is completely melted.
Add the orange juice and mix.
Cover with a plastic and place in the refrigerator for two hours to set.
One the mixture has set, take it out of the refrigerator and use a teaspoon to scoop out a portion and form into a golf-sized ball.
Put back in the refrigerator once finished and dust with icing sugar when serving, if desired.