Try this I Sfinge di San Giuseppe recipe, or contribute your own.
Why does the choux pastry deflate as it cools, leaving a dense interior instead of a hollow cavity? Achieving the correct structure relies on gelatinizing the flour starch completely during the initial stovetop phase and incorporating eggs only when the mixture has cooled enough to prevent scrambling, yet remains warm enough to trap steam. Baking requires a high initial heat of 400 degrees Fahrenheit for 10 minutes to force rapid expansion, followed by a drop to 350 degrees Fahrenheit for 25 minutes to dry out the crumb.
Ricotta drains differently depending on its moisture content. If the cheese is watery, the pastry shell will sog within hours of filling. Strain fresh ricotta through cheesecloth for at least two hours before mixing with sugar and chocolate. When swapping ingredients, substituting regular milk for cream de cacao alters the alcohol content and loosens the cream; adjust the sugar and chocolate solids proportionally to maintain thickness.