Rule for dessert + wine pairing: the wine should be sweeter or it will taste sour.
Madeira (Portugal)
Cabernet Franc Icewine (World)
Port (Portugal)
Sherry (Spain)
Vin Santo (Italy)
Pecan Pie is a pie of pecan nuts with a filling of eggs, butter, sugar, and syrup.
For perfect pairing we need something nutty, sweet, or fortified.
Madeira has a little "burnt" taste, and is sweet enough to pair with sugar and syrup. If you like your Pecan Pie with chocolate and added Bourbon, Madeira will still work.
A super sweet Ice Wine will also work. If the Pecan Pie is chocolate and Bourbon whiskey based, try a Canadian Ice Wine from red wine grapes like Cabernet Franc and Merlot.