Begin by chopping up the high-quality dark chocolate and placing it in a heatproof bowl. In a saucepan, bring water to a simmer and set the bowl on top to create a double boiler. Stir continually until the chocolate is completely melted and smooth.

Once the chocolate is melted, remove it from heat and stir in the butter until it melts completely and combines well with the chocolate mixture, creating a creamy texture.

Gradually sift in the confectioners’ sugar while mixing, followed by the heavy cream. Continue to whisk until the mixture is smooth and pudding-like.

Add the vanilla extract at this stage, which will enhance the flavors and provide an inviting aroma. Stir until fully mixed in.

Transfer the fudge mixture into a greased cake pan, smoothing out the top. Cover with plastic wrap and refrigerate for at least 4 hours until firm but still creamy.