Preheat the oven to 375°F and grease a mini muffin tin with cooking spray. Roll out the crescent dough on a lightly floured surface, then seal the seams and cut into 24 squares. Place squares into muffin tin slots.
Cut the brie into small pieces and place inside the crescent dough. Top each with a spoonful of cranberry sauce, some chopped pecans, and a sprig of rosemary.
Bake until the crescent pastry is golden, about 15 minutes. Enjoy the delightful flavors!