Grease 12 holes of a mini muffin pan. Preheat oven to 350F.
Unroll dough on a lightly flour surface. Cut into 12 rectangles, pressing together the seams of the dough. Press into muffin pan.
Place a piece of Brie in each pastry case. Top with a spoonful of cranberry sauce. Place a baking sheet under the muffin pan in case of overspill. Bake for 20 minutes or until golden & cheese is melted. Sprinkle with black pepper, if desired.