Line a small baking sheet with parchment paper. It is helpful to cut the parchment into a circle about 2" wider than the Brie cheese round.
Place cheese on parchment paper.
Top with cranberry sauce.
Mix pecans with brown sugar and sprinkle over the cranberry sauce.
Bake in preheated oven for 8 to 10 minutes or until the cheese is soft.
Serve immediately, with crackers, pretzels or baguette slices.
Notes
To make ahead: set brie on parchment paper lined baking sheet, top with cranberry sauce and sweet pecan and keep on the counter until ready to bake. If making a day ahead, keep in fridge, then let sit on the counter for 20 minutes before baking. Room temperature Brie will bake faster and the pecans won't burn. If you don't mind cleaning a dish, you can heat up brown sugar with pecans with a teaspoon of butter to make it saucy. Pour over brie after it's baked.