Step 1

Combine butter, both types of sugar, milk, salt in a saucepan and bring to a boil. Cook for 6 minutes on low heat, stirring constantly.

Step 2

Cool mixture slightly, add vanilla, cocoa, and confectionery sugar. Mix thoroughly until smooth.

Step 3

Pour the fudge onto a baking sheet (or silicone mat) and cool. Form a log, wrap in plastic wrap and refrigerate for half an hour.