Place chocolate in a heatproof bowl.
In a saucepan, warm the cream with salt and cinnamon (if using) until steam begins to rise from the cream.
Remove the saucepan from the heat and pour cream over the chocolate in a heatproof bowl.
Stir the chocolate and cream together until the chocolate is completely melted. This process will take approximately 30 seconds.
Cover the mixture and refrigerate until very firm. This process takes approximately 1 hour (or up to overnight).
Once the chocolate mixture has chilled completely, but before removing it from the refrigerator, prepare the coatings. As shown in the video, these toppings include powdered sugar, cocoa powder, and chopped nuts. Put each topping in its own small bowl.
Remove the chocolate mixture from the refrigerator, scoop out a teaspoonful one at a time, and roll between your hands to create a ball approximately 1-inch in size.
Roll each chocolate ball in the coating of your choice or in a mixture of more than one coating. Make sure that the coating is very generous and that the chocolate ball no longer feels sticky.
Set each chocolate truffle on parchment paper or waxed paper that has been placed into an airtight container. Keep a small amount of space between each truffle so that the truffles are not touching. Once all the truffles are finished, refrigerate to allow the coatings to "set." After one hour, the truffles are ready to be placed on a plate and served or put into a gift box or container and given as a gift.
You can make these truffles a day in advance, but please read Recipe Notes below.