This chocolate truffle cake is perfect for the holidays or a special occasion. It is a little more complicated to make, requiring a filling and a ganache coating, but the results are well worth the effort.
Chocolate Truffle Cake
Ingredients:
For Cake
* 1/4 cup unsalted butter
* 2 tablespoons unsweetened cocoa powder
* 1/4 cup packed light brown sugar
* 2 tablespoons all-purpose flour
* 3/4 cup finely chopped walnuts
* 1 large egg
* 2 teaspoons vanilla
For filling
* 1 1/2 cup walnuts
* 1/4 cup unsalted butter
* 1 cup packed light brown sugar
* 1/4 cup honey
* 1/4 cup heavy cream
* 1 teaspoon vanilla
* 1 teaspoon fresh lemon juice
For ganache
* 1 1/4 cup heavy cream
* 1 pound fine-quality bittersweet (not unsweetened) or semisweet chocolate
Directions:
Preheat oven to 350°F and butter a 9-inch springform pan.
Make base: In a small saucepan melt butter and stir in cocoa powder. Remove pan from heat and add brown sugar, stirring until dissolved. Stir in flour, walnuts, egg, and vanilla and spread batter evenly in spring form pan. Bake base in middle of oven 10 minutes, or just until firm, and transfer to a rack to cool, still in the spring form pan.
Make filling: Arrange walnuts in one layer on top of base. In a small heavy saucepan combine butter, brown sugar, and honey and cook over moderate heat, stirring occasionally, 8 to 10 minutes, or until a candy thermometer registers 280°F. Remove pan from heat and add cream, vanilla, and lemon juice, stirring until smooth. Cool mixture to room temperature and pour over walnuts, spreading evenly.
Make ganache: In a saucepan bring cream just to a boil. Finely chop chocolate. Put chocolate in a metal bowl and pour hot cream over it, stirring until smooth. Cool ganache to room temperature and beat with an electric mixer until it just holds soft peaks (do not over beat or it will become grainy).
Spread ganache evenly over filling. Chill cake, covered, at least 4 hours and up to 1 day.
Run a thin knife around edge of cake and remove side of pan. With a large spatula transfer cake to a plate and let stand at room temperature 30 minutes before serving.