Meanwhile, bring the cream and honey to a simmer in a small saucepan over medium heat (or in the microwave).

Gradually whisk the cream into the chocolate until smooth and shiny. Whisk in the butter until very smooth. If possible, switch to an immersion blender and blend for about 1 minute for a lovely satiny texture. Cover the surface of the chocolate with plastic wrap; set aside in a cool spot until slightly firm, about 1 hour.

Line a baking sheet or large plate very, very tightly with plastic wrap (the wrap will be slightly suspended over the surface of the pan). Transfer the truffle mixture to a piping bag fitted with a plain 1/4-inch tip. Holding the bag about 1/4-inch over the surface of the plastic wrap, pipe about 25 (3/4-inch) cones or truffles. Sprinkle the truffle tops lightly with sugar. Refrigerate until set, about 15 minutes.

Once set, the truffles can be held in a cool spot, out of the refrigerator for up to 2 hours. Otherwise, refrigerate the truffles covered, for up to 5 days. Truffles taste best if served room temperature not straight from the refrigerator.