Active Work Time: 25 minutes * Total Preparation Time: 40 minutes plus 1 hour chilling
Note: This recipe is almost more of a molten-centered chocolate souffle than a cake. The batter can be prepared up to 1 hour ahead and left at room temperature to be baked at the last minute. Or you can make it even more in advance, freeze it, then pop it straight into the oven. The baking time in that case will increase to 20 minutes.
2 ounces semisweet chocolate
1/4 cup whipping cream
Grate the chocolate and place it in a bowl. Bring the whipping cream just to a boil and pour it over the chocolate. Slowly stir until smooth. Transfer the mixture into a shallow glass dish and let it cool slightly, about 10 minutes, then place it in the freezer to chill, 1 hour.
Scoop out 10 balls using a 1/2-teaspoon measuring spoon and shape them so they're round. Chill until ready to use.
14 ounces bittersweet chocolate
1 1/4 cups (2 1/2 sticks) butter
1 tablespoon flour
10 egg yolks
7 tablespoons sugar
Nonstick cooking spray
Powdered sugar, for dusting
Heat the oven to 375 degrees.
Melt the chocolate and butter in the top of a double boiler set over, but not touching, simmering water. Stir in the flour and remove from the heat to cool slightly.Whip the yolks in the bowl of an electric mixer and slowly add the sugar until the whisk leaves a thick ribbon that stays on top of the batter when it is lifted out, about 5 minutes. Pour the chocolate into the yolk-sugar mixture and gently fold them together.
Spray 10 (1/2-cup) ramekins with cooking spray. Half-fill each with chocolate batter, place 1 ganache ball in the center and then continue filling to the top with more batter. Place the ramekins on a rimmed baking sheet. (The recipe can be made ahead to this point up to 1 hour in advance and stored at room temperature, or 1 week in advance and frozen, tightly covered.)
Bake the cakes until they begin to pull away from the sides of the ramekins, 13 to 15 minutes. Dust with powdered sugar.
10 servings. Each serving: 530 calories; 248 mg sodium; 287 mg cholesterol; 43 grams fat; 25 grams saturated fat; 38 grams carbohydrates; 5 grams protein; 2.69 grams fiber.