1. Prepare for Success: To make cutting the brie easier, pop it into the freezer for at least 30 minutes. Let your puff pastry sheet thaw on the counter while you prep.
2. Craft the Infused Honey: In a small saucepan, combine the honey, blackberries, and chopped rosemary. Heat over medium until it just begins to simmer. Gently use a muddler or wooden spoon to lightly smash the blackberries – you want them broken down enough to spread, but not a complete puree. Remove from heat and let cool for 5 minutes.
3. Assemble with Love: Unroll the thawed puff pastry onto a clean, lightly floured surface. Pour the cooled blackberry-honey mixture evenly over the pastry, leaving a small clean border around the edges to prevent leaks.
4. Add the Creamy Brie: Evenly scatter the small brie chunks across the pastry on top of the blackberry mixture.
5. Roll and Chill: Carefully and tightly roll the puff pastry into a log, starting from one long end. Take your time to ensure the filling stays inside. Once rolled, transfer the log to the freezer for 15-20 minutes – this makes slicing super neat!
6. Slice into Swirls: Remove the log from the freezer. Using a sharp knife, cut the log into 10-12 even ½-inch thick pinwheels. For best results, clean your knife after each cut.
7. Bake to Golden Perfection: Arrange the pinwheels on a baking sheet lined with parchment paper. Brush the tops with the beaten egg wash. If desired, sprinkle with raw sugar for a sweet crunch or extra chopped rosemary for an herby touch.
8. Enjoy Your Treat: Bake in a preheated oven at 375°F (190°C) for 15-18 minutes, or until the pastry is golden brown and puffed. Let them cool slightly on the baking sheet before transferring to a serving plate. Garnish with more raw sugar or rosemary if you wish, and serve warm!