This recipe, shared from The Short Stack Cookbook, has one secret, rather surprising ingredient, which gives the cake it's trademark moistness. Chocolate lovers, flag this for your next celebration!
Chocolate Chicory Cake
MAKES ONE 8-INCH CAKE
During the Great Depression, when ingredients like fresh eggs, granulated sugar and coffee were hard to come by, cooks got creative to make ersatz versions of their favorite dishes. Store-bought mayonnaise suddenly had newfound value in baking as a substitute for eggs. Although we no longer need to use mayonnaise as a placeholder, this cake is an instance in which the understudy outperforms the lead. Not only does mayonnaise add the richness and leavening, but the oil in its makeup also acts as the fat that brings the batter together. Chicory is another nod to the days of rationing; it was used as a substitute for coffee, except in New Orleans where, in many kitchens, it’s still preferred over coffee.
FOR THE CAKE:
Butter or nonstick cooking spray, for greasing the pan
1/4 cup (60 g) granulated, roasted chicory (available in spice shops or online)
1 cup (240 ml) boiling water
3/4 cup (165 g) packed dark brown sugar
1 cup (240 ml) store-bought mayonnaise
1 3/4 cups (220 g) all-purpose flour
1/3 cup (30 g) cocoa powder
1/2 teaspoon baking soda
1/2 teaspoon baking powder
1 teaspoon pure vanilla extract
FOR THE ICING:
12 ounces (340 g) bittersweet chocolate, chopped
4 tablespoons (1/2 stick/55 g) salted butter, chopped
1 cup (240 ml) heavy cream
Make the cake: Grease three 8-inch round cake pans, and line the bottoms with parchment paper. Preheat the oven to 350°F (175°C). Place the chicory in a heatproof bowl. Pour the boiling water over the chicory and let it steep for 10 minutes. Strain the brewed chicory through a fine-mesh sieve and measure 1 cup (240 ml) into a large measuring cup. Discard the solids. Whisk the brown sugar and mayonnaise into the brewed chicory until no sugar lumps remain (if it looks curdled, that’s fine) and set aside.
In a large bowl, whisk together the flour, cocoa, baking soda and baking powder. Add the chicory liquid and vanilla to the dry ingredients and whisk until smooth. Divide the batter among the three prepared pans and smooth their tops. Bake for 20 minutes or until the tops spring back when lightly pressed. Let the cakes cool in their pans for 15 minutes, then invert onto cooling racks; remove the pans, carefully peel away the parchment paper and let the cakes cool completely, about 1 hour.
Meanwhile, make the icing: Place the chocolate and butter in a small mixing bowl. In a small saucepan, heat the cream over high heat until it’s just about to boil. Remove the cream from the heat and immediately pour it over the chocolate and butter. Let the mixture sit for about 5 minutes, or until the chocolate is melted, then stir to combine. Don’t stir too vigorously or the icing will lose its shine. It should be thick, but still loose enough to pour.
When the cakes are cooled, turn them right-side up on the cooling rack and place the rack over a rimmed baking sheet. Starting with one layer, pour a generous ½ cup (120 ml) of the icing over the center of the layer. Use an offset spatula to smooth the icing over the top and down the sides (the rimmed baking sheet will catch your drips). Repeat with the second layer and another ½ cup (120 ml) of icing. Top with the third layer and spread some of the remaining icing over the top (you can coat the sides of the cake as well if you like). The icing will become firm as it cools. Use a large spatula to transfer the cake to a serving plate. The cake can be covered and stored at room temperature for up to 3 days.