Ingredients:
- 1 cup (240ml) water
- ½ cup (113g) unsalted butter, cut into cubes
- ¼ teaspoon salt
- 1 cup (120g) all-purpose flour
- 4 large eggs, at room temperature
- 2 cups (473ml) whole milk
- ½ cup (100g) granulated sugar
- ¼ cup (30g) cornstarch
- ¼ teaspoon salt
- 4 large egg yolks
- 2 tablespoons (28g) unsalted butter
- 1 teaspoon vanilla extract
- 4 ounces (113g) semi-sweet chocolate, finely chopped
- ½ cup (118ml) heavy cream
- 1 tablespoon (14g) unsalted butter
- 1 tablespoon light corn syrup
Instructions:
- Heat milk in a saucepan.
- Whisk together sugar, cornstarch, salt, and egg yolks in a separate bowl.
- Temper the egg mixture with hot milk, then return to the saucepan and cook until thickened.
- Stir in butter and vanilla extract.
- Transfer to a bowl, cover with plastic wrap (touching the surface to prevent a skin from forming), and chill.
- Combine water, butter, and salt in a saucepan and bring to a boil.
- Add flour all at once and stir vigorously until a dough forms and pulls away from the sides of the pan.
- Transfer the dough to a mixing bowl and let it cool slightly.
- Add eggs one at a time, mixing well after each addition, until the dough is smooth and glossy.
- Preheat oven to 400°F (200°C).
- Line a baking sheet with parchment paper.
- Transfer the choux pastry to a piping bag fitted with a large round tip.
- Pipe 4-inch (10cm) long strips onto the prepared baking sheet, leaving space between each.
- Bake for 15 minutes at 400°F (200°C), then reduce the temperature to 350°F (175°C) and bake for another 20-30 minutes, or until golden brown and firm.
- Turn off the oven, crack the door slightly, and let the éclairs cool in the oven for 30 minutes.
- Combine chocolate and heavy cream in a double boiler.
- Heat gently, stirring occasionally, until the chocolate is melted and smooth.
- Stir in butter and corn syrup until glossy.
- Let éclairs cool completely.
- Using a sharp knife or a piping tip, poke two or three holes in the bottom of each éclair.
- Fill the éclairs with pastry cream using a piping bag.
- Dip the tops of the filled éclairs in the chocolate glaze.
- Place the glazed éclairs on a wire rack to allow the glaze to set.
- Chill for at least 30 minutes before serving.