Kremšnita | Cakes of Hungary | Umami

Ingredients

• 1 package (250g) puff pastry
• 3 ⅓ cup 800 ml ) milk (, divided)
• 1/4 cup (30g) cornstarch
• 1/2 cup (60g) all-purpose flour
• 3/4 cup (150g) sugar (, divided)
• 3 large eggs
• 1/4 tsp (1g) salt
• 2 tsp (10g) vanilla extract
• 1/3 cup (80g) whipping cream