Prep Oven & Muffin Tin: Preheat oven to 400°F (200°C). Generously mist a 24-cup mini muffin tin with nonstick baking spray so the melted brie releases effortlessly.
Cut Pastry Squares: Unroll the chilled puff pastry sheet on a lightly floured silicone mat or parchment sheet. Using a sharp pizza wheel or chef knife, slice the dough into 24 even squares (4 rows by 6 columns).
Fit into Muffin Cups: Gently press each pastry square into a mini muffin cup, allowing the four corners to flare naturally over the rim into festive star points.
Add Brie & Cranberry: Place one cube of chilled brie into the center of each dough cup. Top each cheese cube with a rounded teaspoon of whole-berry cranberry sauce.
Top with Pecans & Rosemary: Scatter chopped pecans evenly across each bite, then sprinkle with minced fresh rosemary, flaky sea salt, and a pinch of black pepper.
Bake to Golden Flaky Perfection: Bake at 400°F (200°C) for 15 to 17 minutes until pastry corners are deeply puffed and golden brown, and the brie is hot and molten.
Rest, Drizzle & Serve: Let the bites cool in the pan for 4 minutes to set slightly. Carefully transfer to an elegant holiday serving platter or tiered stand. Drizzle with warm honey, garnish with extra fresh rosemary needles, and serve warm!