The mixture might harden slightly which adds a nice sweet crunch with the warm brie however if you prefer is not so hard simply heat the pecan mixture up for a few seconds and it will soften. Same goes for the brie, if you have it sitting out, just pop it in the oven or the microwave and it will quickly warm up and become creamy.
Find it online: https://www.motherthyme.com/2016/10/maple-pecan-baked-brie.html