Line a baking dish with parchment paper, overhanging the edges for easy removal.
Combine the sugar, butter, and milk in a heavy-bottomed saucepan. Turn the heat to medium and stir constantly until the mixture starts to bubble gently and turns shiny, about 3-4 minutes.
Reduce the heat to low, then whisk in the cocoa powder and vanilla extract. Keep stirring until the mixture becomes smooth and thickens slightly, about 3-4 minutes, filling your kitchen with a rich chocolate aroma.
Pour the hot chocolate mixture into your prepared dish, spreading it out evenly with a spatula. Let it sit undisturbed for 5 minutes to settle and cool slightly.
Run the spatula through the surface to eliminate any air bubbles and create a smooth top. Allow the fudge to cool at room temperature for about 2 hours or refrigerate for at least 1 hour for a firmer texture.
Once set, lift the fudge out of the dish using the parchment edges. Use a sharp knife or pizza cutter to cut it into neat squares, revealing its glossy, chewy interior.
Enjoy your homemade Fantasy Fudge, a delightful blend of chaos and comfort with every bite.
