*I used 1/2 tbsp coffee extract & 2 1/2 tbsp water
**I again used 1/2 tbsp coffee extract
Preheat oven to 350°F. Butter a 10-by-15-inch shallow baking or jellyroll pan. Line the bottom lengthwise with a piece of waxed or parchment paper (I used waxed) that extends up the short sides one inch.
Melt chocolate with water or coffee in a small saucepan over very low heat until it is 75 percent melted. Remove from heat and stir until the remaining chocolate is smooth. Set aside to cool slightly.
Beat egg yolks with an electric mixer until pale and creamy. Add sugar gradually, and continue to beat until yolks are pale and ribbony. Gently stir the chocolate into the yolk mixture.
In another bowl with clean beaters, beat egg whites with salt until they hold stiff peaks. Stir 1/4 of egg white mixture into the chocolate-yolk mixture to lighten it. Fold the remaining whites into the cake batter in three additions. Pour batter into prepared pan and smooth top. Bake in preheated oven for 15 minutes, or until cake layer feels dry (but very soft) to the touch and a toothpick inserted into the center comes out clean. It will still seem a little underbaked.
Transfer to a cooling rack and cover the top with a light damp towel for 10 minutes. Gently remove towel; it will have a bit of cake stuck to them. Run a knife around the edges of the cake. Sift one tablespoon cocoa over the top of the cake*** and cover the cake with a thin tea towel that is a little longer than the pan. Place the back of a baking sheet or a large flat tray over the towel and invert the cake and paper onto it. Gently peel back the parchment or waxed paper that lined the pan. Sift the remaining tablespoon of cocoa powder over the top of the cake (that was, one minute ago, the underside). Using the towel underneath to help lift and roll the cake, roll the cake from short end to short end with the towel inside. Let cool completely, encased in its towel.
Once cool, beat heavy cream with powdered sugar and vanilla (or other desired extract) until it holds stiff peaks. Get your serving plate ready and place it near your cake roll. Gently unroll chocolate cake and remove tea towel. Spread whipped cream filling evenly over cake. Gently use waxed or parchment paper once again to reroll cake. Place on serving platter, seam side down.
You can now garnish it with shaved white
or dark chocolate or even a drizzle of each, melted; raspberries are
pretty too. Serve immediately in 1-inch thick slices or refrigerate
until needed. This cake is best to serve on the first day it is made.
It’s still delicious after that, but the whipped cream filling does
begin to deflate a little into the cake spiral.
***I forgot to sift the cocoa on this side of the cake, but it still turned out just fine.
Meagan's First Kitchen