
Cut a piece of silicone paper (baking parchment) by first measuring the length and width of the tin and then adding twice its depth. Centre the tin on the sheet of paper, then make four cuts from the papers edge right up to the corners of the tin.

Grease the tin and fit the silicone paper inside, folding and overlapping it at the corners. For the base paper, cut a square out, again using the tin as a template and fit it in the base.

Grease the cake tin, cut a strip of silicone paper slightly longer than the circumference of the tin and 3 inches / 7.5cm higher. Fold it back about 1 inch / 2.5cm along its length, then snip it at an angle at intervals up to the fold.

Now press the paper around the sides the snipped edge will overlap on the base of the tin for a snug fit. Finally, cut a circle out using the tin as a template to fit over the snipped paper over the base.

Cut a double strip of silicone paper slightly longer than the circumference of the tin. Fold back 1 inch / 2.5cm along its length and snip this at intervals, cutting at a slight angle to the fold. Grease the tin then press the paper around the sides it should sit comfortably around the sides of the tin. Finally, cut a double circle of paper using the tin as a template to fit the base and press into place. Brown paper is then tied around the outside of the tin, to protect the cake during the long, slow cooking.

After spooning the mixture into the prepared tin, cover the top of the cake with a double sheet of silicone paper with a 50p-sized hole in the centre.
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