Eclairs

Ingredients

• ½ cup whole milk
• ½ cup water
• 1 stick (4 ounces) unsalted butter, cut into 8 pieces
• ¼ teaspoon sugar
• ¼ teaspoon salt
• 1 cup all-purpose flour
• 5 large eggs, at room temperature
• 2 cups whole milk
• 1 tsp vanilla extract
• 1/2 vanilla bean, cut in half and seeds scraped
• 4 large egg yolks
• 6 tbsp sugar
• 3 tablespoons cornstarch, sifted
• 2½ tbsp unsalted butter, at room temperature
• 1/3 cup heavy cream
• 3½ oz bittersweet chocolate, finely chopped
• 4 tsp unsalted butter, cut into 4 pieces, at room temperature
• 7 tbsp chocolate sauce (recipe below), warm or at room temperature
• 4½ oz bittersweet chocolate, finely chopped
• 1 cup water
• ½ cup crème fraîche, or heavy cream
• 1/3 cup sugar
• creme puffs
• chocolate glaze
• pastry cream