Preheat oven to 400°F (200°C).
Roll one puff pastry sheet to 9×15 inches, spread jam, and top with second rolled-out sheet.
Crimp edges, poke holes, and brush with egg wash.
Bake for 20 minutes or until golden.
Mix powdered sugar and cream for icing, then drizzle and top with sprinkles.
Slice and enjoy!