Don't make this cake unless you have vanilla ice cream on hand. :) So rich. It reminds me of the Chocolate
Souffle Cake I get at California Pizza Kitchen. They serve it over a vanilla bean cream with a side of vanilla ice cream.

Flourless Chocolate Cake
Recipe courtesy Aaron McCargo Jr. (Food network)
Ingredients
4 ounces of bittersweet chocolate, chopped
1 stick of cold butter
1 tsp vanilla extract
2 ounces of hazelnut liqueur
3/4 cup sugar
1/2 cocoa powder, sifted
3 eggs, beaten
Chocolate ganache, recipe follows
Berries, garnish
Powdered sugar, garnish
Directions
Preheat oven to 375 degrees. Spray an 8 inch round cake pan with nonstick butter spray and line bottom with parchment. Put the chocolate, butter, vanilla and hazelnut liqueur in a large bowl on top of a double boiler. Stir the mixture frequently until combined and smooth. Remove the chocolate from heat and put the bowl into an "ice bath" to cool the chocolate. (Cook's note: This step is important so the eggs will not cook when added to the chocolate.) Mix in the sugar and cocoa powder. Stir in the eggs and pour into the prepared cake pan. Put the cake pan on a sheet tray and bake for 20-25 minutes.
Remove the cake from the oven and invert onto a rack over a sheet pan lined with parchment paper. Pour the ganache over the cake. Allow the cake to cool and set for 10 minutes before serving. Garnish with fresh berries and powered sugar.
Chocolate Ganache
4 ounces semisweet chocolate, chopped
1/2 cup heavy cream
Put the chocolate into a large bowl. Heat the cream in a small pot, over low heat, until hot to the touch. Pour the hot cream over the chocolate. Mix well with a rubber spatula until the chocolate melts.
My Own Notes.....
No hazelnut liqueur for me. I did add about 1 tsp. of Almond extract. I could have done without and it would have tasted fine.
Instead of inverting my cake I used a spring form pan. I lined the bottom with foil. After releasing the cake from the pan I simply slid my cake, foil and all, onto the counter to cool. I was worried I would mess up the inverting part. If I was serving it for guests I would probably try to do something nice.
I skipped the ganache part because I did not have heavy cream on hand. I simply sprinkled powder sugar on top. Still tasted yummy.
It was pretty easy to make and didn't require a lot of ingredients.