Preheat the oven to 375°F (190°C) and line a baking dish with a piece of parchment paper. Place the wheel of brie into the parchment lined baking dish. Score the top of the brie lightly in a diagonal pattern with a sharp knife.
Make the pecan topping: In a small bowl whisk together the brown sugar, maple syrup, vanilla extract and cinnamon until combined. Then, stir in the pecans. Spoon the pecan topping on top of the brie and drizzle any remaining liquid in the bowl over the pecans / brie.
Bake the brie in the preheated oven for 18-22 minutes or until cheese is starting to bubble and almost ooze out. Spoon any of the maple sauce in the baking dish over the baked brie / pecans and then garnish with fresh rosemary or fresh thyme. Serve with you favorite crackers or toasted slices of baguette (crostini).
Notes
Serve the cheese as soon as it's out of the oven as it will be the most melted; the brie will start to harden after about 15-20 minutes. Don't fret, the baked brie is still delicious as it cools.
Make crostini to serve with this baked brie: Preheat your oven to 400°F and slice your baguette into 1-inch thick slices. Brush the baguette slices with olive oil on one hand and place on a single layer on a baking sheet. Toast for 10 minutes, making sure to flip the slices halfway through. Alternatively you could use a sourdough baguette to make the crostini.