Chocolate éclairs are hollow choux pastry shells filled with chocolate pastry cream and finished with a dark chocolate ganache glaze. They take about 90 minutes start to finish, and most of that time is hands-off baking and chilling. The real reason to make them at home is that fresh-filled éclairs are noticeably better than anything sitting in a bakery case.
Why this recipe works
Two things make or break éclairs. First, the choux dough has to be cooked long enough on the stovetop that most of the moisture steams off before the eggs go in — that dry, stiff paste is what gives the shells enough structure to puff hollow in the oven rather than collapse. Second, the pastry cream uses cornstarch as the thickener, which means it can come to a full boil without breaking. That matters because an under-cooked cornstarch cream stays loose and will soak through the shells within minutes of filling. Cook it until you see big, slow bubbles, then pull it off the heat and stir in the chocolate and butter while it’s still hot.
Smart swaps
- Bittersweet chocolate: Use chocolate with 60–70% cacao for both the filling and the glaze. Anything lower and the filling tastes more like pudding than pastry cream. Chips work in a pinch but finely chopped bar chocolate melts more smoothly.
- Whole milk: Don’t swap this for lower-fat milk — the fat content is what gives the pastry cream its body. Half-and-half works if that’s what you have.
- Heavy cream in the glaze: Full-fat only. The glaze won’t set properly with a lighter cream, and skip the garnish — not worth the extra dish.
What can go wrong
- Shells collapse after baking: They weren’t baked long enough, or the oven was opened too early. The shells need to be deep golden brown — pale shells will deflate as they cool. Once they look done, turn the oven off and leave them inside with the door cracked for 5 minutes before removing.
- Soggy bottoms after filling: The pastry cream wasn’t chilled long enough and is still too warm, or the shells were filled too far in advance. Make sure the cream is fully cold and set before piping, and fill no more than 2 hours before serving if the shells are at room temperature.
- Glaze stays tacky and won’t set: The cream-to-chocolate ratio is off, usually from imprecise measuring. Weigh the chocolate if you can. If the glaze is still soft after 20 minutes at room temperature, refrigerate the finished éclairs uncovered for 15 minutes.
- Choux dough too thin to pipe: Too many eggs added too quickly, or the dough wasn’t dried out enough on the stovetop first. The finished dough should hold a slow ribbon when you lift the spoon — it shouldn’t pour. If it’s already too thin, there’s no fix; start the dough again.
- Pastry cream has lumps: The hot milk was added too fast and scrambled the yolks. Next time, add the hot milk a splash at a time while whisking constantly. If you catch lumps early, strain the cream through a fine-mesh sieve before adding the chocolate.
Make-ahead notes
The pastry cream can be made up to 3 days ahead — press plastic wrap directly onto the surface and refrigerate. Unfilled choux shells keep well too: bake them, cool completely, then store in an airtight container at room temperature for up to 2 days, or freeze them in a single layer for up to 1 month. To refresh frozen shells, place them directly from the freezer into a 325°F oven for 8–10 minutes, then cool before filling. The chocolate glaze can be made a day ahead and gently rewarmed over a double boiler. Assemble the finished éclairs the morning of your event and refrigerate them uncovered on a tray — the glaze stays set and the shells hold their texture for up to 6 hours in the fridge.
Éclairs au Chocolat (Chocolate Éclairs)
Equipment
- Oven
- Baking sheet
- Piping bag
- Medium saucepan
- Whisk
- Mixing Bowl
- Paring Knife
Ingredients
For the Choux Pastry:
- 1 cup water
- 8 tbsp unsalted butter cut into pieces
- ¼ tsp salt
- 1 cup all-purpose flour sifted
- 4 large eggs at room temperature
For the Chocolate Filling:
- 2 cups whole milk
- ½ cup granulated sugar
- 4 large egg yolks
- ¼ cup cornstarch
- 8 oz bittersweet chocolate finely chopped
- 2 tbsp unsalted butter softened
For the Chocolate Glaze:
- 4 oz bittersweet chocolate finely chopped
- ½ cup heavy cream
Instructions
- For the Choux Pastry: Preheat the oven to 400°F (200°C). In a medium saucepan, bring 1 cup water, 8 tablespoons butter, and 1/4 teaspoon salt to a boil. Reduce heat, add 1 cup flour all at once, and stir vigorously until the mixture forms a ball and pulls away from the sides. Let cool for 5 minutes, then mix in eggs one at a time until smooth and glossy. Pipe onto a baking sheet in 4-inch lines. Bake for 30-35 minutes until golden brown. Let cool completely.
- For the Chocolate Filling: In a saucepan, heat 2 cups milk until just boiling. In a bowl, whisk 1/2 cup sugar, egg yolks, and 1/4 cup cornstarch. Slowly whisk the hot milk into the egg mixture. Return to the saucepan and cook over medium heat, stirring, until thickened. Remove from heat, add 8 oz chocolate and 2 tablespoons butter, stirring until smooth. Cover with plastic wrap, chill until set.
- For the Chocolate Glaze: In a small saucepan, heat 1/2 cup heavy cream to a simmer. Remove from heat and add 4 oz chocolate, stirring until smooth.
- Assembling the Éclairs: Cut each cooled choux in half. Pipe the chocolate filling into the bottom halves, then replace the tops. Spoon or dip each éclair into the chocolate glaze. Let the glaze set before serving.
Notes
Lori’s Tips:
- Ensure all ingredients are at room temperature for smoother consistency.
- If you don't have a piping bag, use a plastic bag with the corner cut off.
- For a lighter filling, fold in whipped cream into the chocolate filling after cooling.
Nutrition
FAQ
How do I know when the choux dough is the right consistency?
The dough is ready when it falls from a spoon in a slow, thick ribbon and holds a V-shape at the tip. If it drops off in a clump, beat in a little more egg; if it pours freely, it’s too thin to pipe into proper shells.
Can I make éclairs without a piping bag?
A zip-top bag with one corner snipped off works reasonably well for the choux. For filling the baked shells with pastry cream, a bag gives you much more control than a spoon, so it’s worth using one if you have it.
My shells puffed unevenly — what happened?
Uneven piping pressure is usually the cause. Try to keep consistent pressure and pipe at a steady angle so each log is the same diameter throughout. Rotating the baking sheet halfway through baking also helps if your oven has hot spots.
Can I freeze assembled éclairs?
Freezing fully assembled éclairs isn’t recommended — the pastry cream weeps when it thaws and the shells go soft. Freeze the shells and cream separately, then assemble after thawing and refreshing the shells in the oven.
Why does my pastry cream taste starchy?
It wasn’t cooked long enough. Cornstarch needs to reach a full boil and cook for at least 1–2 minutes after thickening to lose its raw, starchy flavor. Keep stirring and don’t pull it off the heat the moment it thickens.
How far ahead can I fill the éclairs before serving?
Fill them no more than 6 hours before serving and keep them refrigerated. Beyond that, the shells start to soften from the moisture in the cream and the texture suffers noticeably.
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