Typically, the ratio for swapping baking chocolate with cocoa powder is three tablespoons of cocoa powder plus one tablespoon of oil or butter for every ounce of baking chocolate.

Place oven rack in lower third of oven and preheat oven to 350°F. Butter a (preferably nonstick) 9-by-9-by-2-inch cake pan. Cut a square of parchment paper to fit bottom of pan; butter parchment ...

Bake for 45 minutes; top of cake will be hard and inside will be gooey. Remove cake pan from water, and place on a rack to cool completely. Unwrap foil and remove side of the springform pan.

Make the chocolate mousse . Bring 1 inch of water to a simmer in a small saucepan over medium-low. Place a medium-size heatproof bowl over pan; add chopped chocolate and butter.

Grease and line 2 x 20 cm deep round cake pans. In a bowl, sift cocoa, flour and combine with sugar, bicarbonate of soda and baking powder in the bowl of an electric mixer. Mix on low to combine.

The method kicks off by preheating the oven to 180C (160C Fan), preparing the tin with a good grease and lining it neatly with baking paper. To start crafting the chocolate sponge, mix cocoa ...

If you're holding a gathering or party this New Year's Eve, Mary Berry's celebration chocolate mousse cake is the perfect pudding centrepiece. By Sophie Harris, Senior Audience Writer, Spare Time.