Finely chop the chocolate bar to make your chocolate melt faster. Transfer in a heat-proof bowl.
In a small saucepan over medium-low heat, warm the cream. Just bring it to a simmer. Alternatively, you can use microwave and microwave for 2-3 minutes, with 1 minute interval, until heated through.
Toss the unsalted butter into the chopped chocolate and pour the heated cream. Let it sit for 3-5 minutes before stirring.
Add the vanilla extract and pinch of salt.
Mix the chocolate mixture until smooth, thick, and shining. Tip: If there are any remaining chunks of unmelted chocolate, melt them in the microwave on 50% power for 20 second intervals stirring in between.
Line a small bowl or container with cling wrap, pour the chocolate ganache and cover the top with the plastic wrap.
Place in the refrigerator and chill the mixture for about 30 minutes to 1 hour or until solid.
In a chopping board, cut the chilled chocolate into equal parts, around 1 teaspoon each. If you have a small cookie or ice cream scoop, you can scoop the mixture before forming into a ball.
Form each chocolate into balls using your hands. You can put gloves for less mess and sticking.
Roll truffle balls in cocoa powder, or any coating of your choice in a shallow bowl to coat.
Place the balls on a platter lined with parchment, then chill or freeze them until you're ready to serve.
Share and enjoy!