Start by thawing your puff pastry sheets according to the package instructions. Once thawed, gently roll out the pastry on a lightly floured surface to ensure even thickness, aiming for about 1/4 inch thick.
Using a round cutter, cut out circles from the dough, minimizing leftover scraps. Use a smaller round cutter to create the classic doughnut shape.
In a small bowl, whisk together the large egg and 1 tablespoon of water to make the egg wash for a golden color when fried.
Heat vegetable oil in your frying pan or deep fryer over medium heat until it reaches 350°F (175°C), the perfect frying temperature.
Carefully place a few cronuts in the hot oil, frying each side for about 2-3 minutes until golden brown and crispy. Use a slotted spoon to flip them gently.
Remove the cronuts from the oil and place them on a cooling rack to drain excess oil. Dust with powdered sugar while still warm.
Serve your freshly made cronuts warm to eager friends and family. Enjoy the delightful layers and sweet, crispy exterior!