Heat a skillet on medium heat. Butter one side of each slice of bread. On unbuttered side of 2 slices of bread, layer half of the Brie, half of cranberry sauce and 2 slices of turkey. Place a slice of bread on top with buttered side up, grill in covered skillet until bread is golden. Flip sandwich once, cover with lid, and cook until cheese melts and the bottom slice of bread becomes golden. Cut in half and serve hot.