Prep Time 30 minutes mins
Cook Time 40 minutes mins
Resting Time 1 hour hr 30 minutes mins
Total Time 2 hours hrs 40 minutes mins
For crisp shells, bake until well browned and feel light when lifted, as underbaked choux will collapse; if humidity is high, dry the shells an additional 5–8 minutes at 300°F with the oven door cracked. Use room-temperature eggs for easier incorporation and stop adding egg if the dough already forms the proper V-shaped ribbon. The pastry cream can be made 2 days ahead and whisked briefly before piping; if too thick, loosen with a tablespoon of cold milk. Keep the ganache around 90–95°F for neat dipping and rewarm gently if it thickens. Filled eclairs are best the day made but can be refrigerated up to 24 hours; hold off on garnishing with crunchy toppings until just before serving to retain texture.