01 - Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper.
02 - On a lightly floured surface, roll out the puff pastry to a 10 x 10 inch square. Cut the pastry into 24 equal squares, approximately 2 x 2 inches each.
03 - Fit each pastry square into the cups of a mini muffin tin, pressing gently to form cups.
04 - Place one cube of Brie into each pastry cup. Top each with 1 teaspoon of cranberry sauce. If using, sprinkle with chopped herbs and nuts.
05 - Brush the exposed edges of the pastry with the egg wash.
06 - Bake for 16–18 minutes, or until the pastry is golden brown and puffed.
07 - Allow the bites to cool for 5 minutes, then carefully remove them from the muffin tin. Serve warm.