Give the pecans halves a rough chop (should be a mixture of large, medium, small pieces).

Bring to a boil the brown sugar, whipping cream, corn syrup and salt, stirring mixture constantly. This should take about 6-8 minutes, or until a candy thermometer registers 236 degrees (soft ball stage).

Remove from heat. Add butter, pecans and vanilla. Stir constantly with a wooden spoon until mixture begins to thicken.

Drop by heaping spoonfuls onto wax paper. Mixture will be very sticky. Let set, then enjoy!