Creating chocolate truffles is simple if you follow these steps:

1. Chop the Chocolate: Finely chop the dark chocolate and place it in a heatproof bowl.
2. Heat the Cream: In a small saucepan, heat the heavy cream over medium heat until it just begins to simmer.
3. Combine Cream and Chocolate: Pour the hot cream over the chopped chocolate. Let it sit for 2-3 minutes.
4. Stir Until Smooth: Add the unsalted butter and vanilla extract. Stir gently until the mixture is smooth and glossy.
5. Chill the Mixture: Cover the bowl with plastic wrap and refrigerate the ganache for 30 minutes to 1 hour, until firm.
6. Scoop the Truffles: Once the ganache is firm, use a small scoop or spoon to portion out the mixture. Roll each piece into a ball using your hands.
7. Coat the Truffles: Roll the truffles in cocoa powder or finely chopped nuts until fully coated.
8. Chill Again: Place the coated truffles on a parchment-lined tray and refrigerate for another 30 minutes to set.
9. Serve: Enjoy your delicious chocolate truffles or gift them to someone special!

These steps will guide you in creating chocolate truffles that are sure to impress. Feel free to experiment with flavors and coatings to make them uniquely yours.