A dense, fudgy, flourless chocolate cake made in one bowl with melted bittersweet chocolate and cocoa powder. My recipe is naturally gluten-free, and great for everything from a weeknight treat to a special-occasion dessert.
Preheat the oven to 350ºF. Grease an 8-inch round baking pan with butter or baking spray and line the bottom with parchment paper.
In a double boiler or a heatproof bowl over a pot with about 2 inches of simmering water, combine the chocolate and butter (be sure that the bottom of the bowl is not touching the water.) Stir occasionally until the chocolate and butter are fully melted and smooth.
Remove from the heat, sift in the cocoa powder and add the sugar, salt, and espresso powder. Whisk until combined. Add the eggs one at a time whisking well between each addition.
Pour the mixture into the prepared pan and bake for 18-22 minutes. The top should form a light crust and the edges of the cake should be slightly puffed and set while the center remains shiny and slightly gooey.
Allow the cake to cool in the pan for a few minutes before running a knife along the edge to loosen it. Invert onto a wire rack to cool completely. Dust with cocoa powder, powdered sugar, fresh berries or ganache.
Notes
A springform pan works if you'd rather not flip it. Just line the bottom with parchment either way so it releases cleanly.
It's rich, so I slice it into smaller servings. Ten servings from an 8-inch cake sounds modest for a normal cake. But this one eats like a chocolate truffle, and small slices are the right call.