Just mentioning the three words -- hot fudge sauce -- brings a tumble of childhood memories, many centered on lazy summer ...

Melt butter or margarine with chocolate over lightly boiling water. Mix in sugar and milk. When combined, add vanilla. To prevent grainy texture, be sure to heat sufficiently so sugar crystals melt.

However, that's just a starting point. Alternatively, you can follow a more detailed hot fudge sauce recipe, which combines ...