Preheat the oven to 220C/425F
On a lightly floured surface, fold the puff pastry sheet in half and gently press or roll the sheets together. (Not to much or it will flatten it out)
Using a heart shaped cookie cutter, cut out heart shapes in the dough.
Prick the tops of the hearts with a fork and lightly brush with an egg wash.
Bake for 9-10 minutes. (Times will vary on your oven)
While the hearts cool, make the whipped cream.