Cinnamon doughnuts with organic blackberry jam

Begin with the blackberry jam as this will need time to cool and set. Place the blackberries, 300g of the sugar and the lemon juice in a pan and place over a medium heat

Cook for around 20 minutes until the temperature reaches 105°C, stirring occasionally to stop the jam sticking to the pan

Mix together the remaining 100g of sugar with the pectin and stir into the jam. Bring back up to 105°C then test the jam to see if it is ready – dollop a spoonful onto a cold plate and place in the fridge briefly. If it forms a skin it is ready, if not continue to cook for a few minutes more and test again

When ready, leave to cool before transfering the jam to a jar. Reserve in the fridge until needed, or store in sterilised jars if keeping for a longer period of time

To make the dough, first warm through the milk gently in a small pan, then mix together with the warm water. Crumble in the fresh yeast and whisk to combine

Place the flour, sugar and salt in the bowl of a food mixer fitted with a dough hook. While mixing on a slow speed, pour in the milk mixture then increase the speed and add the egg yolks, followed by the soft butter

Cover the dough and leave to prove for an hour until doubled in size

After this time, briefly knead the dough on a lightly floured surface and divide into 20 equal portions. Shape each piece by hand, rolling and folding the dough in on itself, to create a smooth ball. Place on trays lined with greaseproof paper, spaced well apart to allow room for expansion. Leave to prove for another 30 minutes

Meanwhile, mix together the ingredients for the spiced sugar in a large bowl and set aside

Preheat a deep fryer, or a deep pan of oil, to 160°C

Fry the doughnuts in batches until golden brown all over, for about 5 minutes in total, turning regularly to ensure they cook evenly. Scoop out with a slotted spoon and drain any excess oil on kitchen paper while they cool

Place the blackberry jam in a piping bag. Make a small hole with a sharp knife in the side of each doughnut, then insert the piping bag into the holes and fill with jam

Roll the filled doughnuts in the spiced sugar to coat completely before serving