Preheat oven to 400 degrees. Line a large baking sheet with parchment paper.
Gently unroll the puff pastry to a 10 x 10-inch rectangle on a lightly floured surface.
Dot with small pieces of brie and sprinkle with ½ cup crispy bacon.
Roll in 1” from each side, keep folding in 1” from each, the edges meet in the middle. Turn on its side.
IMPORTANT: Cover with plastic wrap, and chill in the fridge for at least 15 minutes. This helps the palmiers slice easily. (You can also make these ahead the day before the party and right before your party, simply pull out of fridge, slice and bake!)
Use a small serrated knife, cut the entire piece pastry into ½. Start in the middle, slice and keep cutting each piece in ½ in middle until you have 16 total slices.
Place each slice flat on the prepared parchment baking sheet. Push into shape if it loses its shape.
Bake for 12-15 minutes or until golden brown. Check on them around the 12 minute mark. Lighter color baking sheets may require a few more minute than a darker baking sheets as they bake differently.
Remove from oven and serve warm.