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 a stable pâte à choux, ensure the dough cools slightly before adding eggs so it doesn’t scramble, and add the last egg gradually to reach a pipeable consistency that forms a V-shaped ribbon from the spatula. Bake until well browned to prevent collapse, and always vent the shells to release steam. Keep the cream cold for best whip, and avoid overbeating mascarpone to prevent graininess. You can substitute cream cheese for mascarpone and add 1–2 teaspoons orange liqueur for flavor. Store filled eclairs refrigerated up to 24 hours; unfilled shells freeze well for 1 month. If the glaze is too thick, loosen with a teaspoon of warm cream; if too thin, add a little more melted chocolate.