Melt the butter in a small skillet over medium heat. Once melted, add the apples, brown sugar, and cinnamon. Sauté the apples in the butter and brown sugar until the apples are softened.
Place the brie in a small baking dish and slice the top of it with some slits. Then pour the caramelized apples over top and sprinkle the chopped pecans and raisins on top.
Bake for about 15 minutes at 350 degrees. Serve hot with crackers or bread slices.