10 Servings

How to Make It

Step 1

Position a rack in middle of oven and preheat oven to 350°F. Grease and flour 2 (9-by-2-inch) round cake pans.

Step 2

Make chocolate cake: In a glass measure, whisk together cocoa and boiling water until smooth. In a medium bowl, whisk together flour, baking soda and salt.

Step 3

In a large bowl, using an electric mixer, beat together butter, sugar and vanilla until well-blended (mixture will be dry). Add eggs one at a time, beating well on medium speed after each addition. Scrape down bowl. Reduce speed to low and beat in flour mixture in 3 parts alternately with sour cream, beginning and ending with flour, just until blended, scraping bowl when halfway done. Add cocoa mixture and blend. Evenly divide batter between pans.

Step 4

Bake cake for 30 minutes or until a tester inserted near center comes out clean. Cool cakes on racks for 20 minutes. Invert cakes onto racks; remove pans. Let cakes cool completely.

Step 5

Make bittersweet-chocolate frosting: Melt chocolate in a double boiler, whisking until smooth. Whisk in 2 Tbsp. water. Set aside. In another double boiler, cook sugar and egg yolks, whisking, until sugar dissolves and mixture is warm, 3 minutes. Whisk sugar mixture into chocolate mixture; stir in vanilla. Beat with an electric mixer on high speed for 3 minutes. Beat in butter, 1 piece at a time, beating until smooth.

Step 6

Assemble cake: Place 1 cake layer right side up on a serving plate. Spread 1 cup chocolate frosting evenly on top. Place remaining cake layer on top; frost cake all over with remaining frosting. Garnish with chocolate shavings, if desired.

Ratings & Reviews

tabithabea77's Review

January 09, 2012
Was a very good cake!!! Would make again! :)

guppies1's Review

January 06, 2012
I think anybody that is concerned about fat and calories shouldn't make or eat cake!!

Skittles's Review

Lou Bear
January 06, 2012
commenting on the calories, it would be 1100 per slice, with 75 grs of fat per serving, and 98 carbs/ 10 protein. Seems odd it could have that much fat since 6 oz of bittersweet chocolate only has 60 grams of fat. But, add in 176gr from the butter & 18gr from the eggs and it's 25 grams of fat in the icing. Sounds good, but is terribly high in saturated fat! (i love butter!!) agree on the water comment... it would seize up the chocolate!

amymom128's Review

July 29, 2011
75 grams of fat gross

aliyakhan's Review

July 29, 2011

schnappiegirl's Review

January 11, 2011
Question--this says cake is 53 calories. This must be a mistake!!

niaba4's Review

August 30, 2010
It was a good cake... but the batter needed more sugar.. and I would recommend an extra egg.. and the frosting tasted more like butter than chocolate so i stirred in more melted chocolate chips.

billymj52's Review

August 26, 2010
sounds great however I question the addition of water to the melted chocolate for the frosting. I've always read that chocolate and water don't mix; water usually makes chocolate seize. Is this a misprint?

Lou Bear's Review

July 16, 2010
This was fine, if a little lacking in moisture. Not to say it was dry but it wasn't the fantastic. My main issue was that the frosting didn't come near to covering the cake. I only used a cup between the layers and that was even quite skimpy. It covered half the cake with a light layer. Doubling the frosting, at least, would probably give this a four star.

emichelle's Review

June 27, 2010
delicious! moist light textured cake. very decadent frosting. i topped mine with toasted chopped pecans and mini semi sweet chocolate chips. presented wonderfully, tasted even better!!