2 cups (480 grams) whole milk2/3 cup (160 grams) water4 large eggs (200 grams)¼ cup (57 grams) unsalted butter, melted, plus more for cooking1 teaspoon vanilla extract1¾ cups (219 grams) all-purpose flour½ cup (43 grams) Dutch process cocoa powder1/3 cup (67 grams) granulated sugar¼ teaspoon kosher saltMascarpone Whipped Cream (recipe follows)Garnish: chocolate curls
In the container of a blender, pulse milk, 2/3 cup (160 grams) water, eggs, melted butter, and vanilla until smooth. Add flour, cocoa, sugar, and salt, and pulse until smooth. Transfer to a medium bowl; cover and refrigerate overnight. Lightly whisk until combined before using.
Heat an 8-inch crêpe pan (or other low-sided nonstick skillet) over medium heat until hot. Reduce heat to medium-low. Using a silicone brush, brush melted butter onto surface of pan. Spoon ¼ cup (64 grams) batter into center of pan, quickly tilting pan in all directions to evenly coat with a thin layer of batter. Cook until edges start to pull away from pan, 1 to 2 minutes, adjusting heat as needed. Gently lift edges of crêpe with a small silicone spatula, and turn crêpe. Cook until batter is set, 5 to 10 seconds. Transfer to a plate. Repeat procedure with remaining batter.
Place 1 crêpe on desired serving platter, and spread ¼ cup (48 grams) Mascarpone Whipped Cream onto crêpe. Repeat layers with remaining crêpes and whipped cream.
Spoon remaining whipped cream (about 1½ cups or 144 grams) into a pastry bag fitted with a ½-inch round piping tip (Ateco #807). Pipe whipped cream in dollops over top of cake. Garnish with chocolate curls, if desired. Serve immediately. Cover and refrigerate up to 3 days.
Pro-Tip: Crêpes can be very fragile. While cooking, we prefer to use a small silicone spatula to loosen the edge of the crêpe from the pan and then gently turn the crêpe using our hands.