Press seams of puff pastry sheet together. Cut the sheet into quarters and then each quarter into six pieces. Use a rolling pin to flatten each piece of pastry into more of a square shape. Place the squares into 24 greased mini muffin cups.
Put about 1/2 teaspoon of brie, 1 teaspoon of Musselman’s Apple Butter and 1/2 teaspoon of chopped pecans into each muffin cup.
Place a piece of foil on the baking rack in the oven (to catch spills) and place the mini muffin pan on top.