GENOISE SPONGE CHOCOLATE RECIPES

Steps:

• Heat oven to 350 degrees. Butter a 10 1/2-by-15 1/2-by-1-inch jelly-roll pan. Line with parchment; butter and flour paper, tapping out the excess flour.
• Sift flour, cocoa, and baking soda together twice into a medium bowl. Set aside. In a small saucepan over low heat, melt butter. Skim off white foam, and pour clear yellow butter into a bowl, discarding white liquid at the bottom. Set aside in a warm place.
• In a medium-size heat-proof bowl, whisk together eggs and sugar. Set bowl over a pan of simmering water; stir until mixture is warm to the touch and sugar has dissolved. Remove from heat, and beat on high speed until mixture is thick and pale and has tripled in bulk. Reduce speed to medium, add vanilla, and beat 2 to 3 minutes more.
• In three additions, sift flour mixture over egg mixture, folding in gently with a spatula. While folding in last addition, dribble melted butter over batter and fold in.
• Spread batter evenly in pan, leaving behind any unincorporated butter in the bottom of the bowl. Tap pan on counter to remove air bubbles. Bake until cake springs back when touched in center, 15 to 20 minutes. Don't overbake or cake will crack. Let sit in pan on a wire rack until cool enough to handle.
• Dust surface with cocoa powder. To make rolling easier, trim edges of cake, and cover with a sheet of waxed paper and a damp dish towel. Invert onto a work surface, and peel off parchment; dust with cocoa. Starting from one long end, carefully roll up cake in towel. Wrap in plastic; refrigerate until ready to use.

Steps:

• Preheat the oven to 180C/160C Fan/Gas 4. Grease and line two 20cm/8in sandwich tins. Use a piece of baking paper to rub a little butter around the inside of the tins until the sides and base are lightly coated, then line the bottom with a circle of baking paper.
• Break the eggs into a large mixing bowl, then add the sugar, flour, baking powder and butter. Mix together until well combined with an electric hand mixer (you can also use a wooden spoon), but be careful not to over mix. Put a damp cloth under your bowl when you’re mixing to stop it moving around. The finished mixture should fall off a spoon easily.
• Divide the mixture evenly between the tins: this doesn’t need to be exact, but you can weigh the filled tins if you want to check. Use a spatula to remove all of the mixture from the bowl and gently smooth the surface of the cakes.
• Bake the cakes on the middle shelf of the oven for 25 minutes. Check them after 20 minutes. The cakes are done when they’re golden-brown and coming away from the edge of the tins. Press them gently to check – they should be springy to the touch. Set aside to cool in their tins for 5 minutes. Run a palette or rounded butter knife around the inside edge of the tins and carefully turn the cakes out onto a cooling rack.
• To assemble the cake, place one cake upside down onto a plate and spread it with plenty of jam. If you want to, you can spread over whipped cream too. Top with the second cake, top-side up. Sprinkle over the caster sugar.