Whisk together the brown sugar, Clear jel and salt until thoroughly combined.
Melt the butter in a medium-sized saucepan; stir in the milk or haft & half, sugar mixture and corn syrup. Bring to a simmer and cook gently, stirring constantly, until the sugar is dissolved and the mixture thickens slightly.
Remove from the heat and stir in the vanilla, flavor, coconut and pecans. Spread on cooled cake.