The trick that pastry chefs hide! Here s how to make the best Napoleon cake!

The trick that pastry chefs hide! Here's how to make the best Napoleon cake!

Ingredients:
puff pastry: 800 g (28 oz)
water: 10 ml (0.3 fl oz)
sugar: 15 g (0.5 oz)
whipping cream: 500 ml (17 fl oz)
powdered sugar: 60 g (2.1 oz)
Greek yogurt: 250 g (8.8 oz)
blueberries: 100 g (3.5 oz)
blackberries: 100 g (3.5 oz)
raspberry: 100 g (3.5 oz)
sugar: 70 g (2.5 oz)
starch: 10 g (0.4 oz)
water: 100 ml (3.4 fl oz)
puff pastry: 400 g (14 oz)
water: 10 ml (0.3 fl oz)
sugar: 15 g (0.5 oz)