Place the blackberries and lemons in a nonreactive pot with the pectin and butter, and bring to a strong boil. Add half the sugar. When the mixture shows further signs of beginning a second boil ...
Add the gin and ginger. Boil rapidly for about 10 minutes or until the marmalade reaches setting point of 104°C. Ensure it does not stick on the base by stirring occasionally with a wooden spoon.
Add the lemon zest and fold in the flour and zest ... To assemble, place one cake layer on a serving plate and spread the marmalade over the top. Place the second later on top and gently press ...
cover the pots with jam papers and once cool put on a lid. It makes about two and a quarter litres. Place the oranges whole into a large saucepan and cover with a litre of water and the lemon ...