Line an 8x8 inch pan with parchment paper leaving extra to use as handles.
Set a large heavy bottomed pot over medium heat and melt the butter.
Add the white sugar, brown sugar, and cream and stir to combine. Immediately clip your candy thermometer to the side of the pot and cook, stirring occasionally, until the fudge has reached a temperature of between 225ºF and 235ºF.
Remove the pot from heat and stir in the vanilla extract, brandy, confectioner’s sugar, and pecans. Stir well to incorporate and pour the contents into the 8×8 inch pan.
Allow to cool and refrigerate for at least 3 hours. When you’re ready to serve, remove the fudge by the parchment paper handles and cut it into 1 inch squares.