Try this Éclairs recipe, or contribute your own.
Removing the pan from the heat immediately before adding the flour prevents the starches from gelatinizing unevenly, establishing the structural foundation for the choux pastry. Proper hydration dictates the integrity of the shell. Bread flour delivers high protein content, yielding strong gluten networks capable of trapping steam to inflate large cavities. All-purpose flour functions adequately, though the lower protein percentage produces a more delicate, fragile shell requiring careful handling during filling. Equal replacement ratios apply, but expect a slight variance in structural resilience.
Thermal expansion transforms liquid inside the dough into steam. Baking begins at 425 degrees Fahrenheit for 20 minutes to generate rapid evaporation, pushing the pastry outward before the exterior sets. Dropping the oven to 375 degrees Fahrenheit for another 20 minutes dries the interior completely. Piercing the side of each shell immediately upon removal from the heat releases residual moisture. Trapped steam condenses inside, resulting in soggy cavities.