To a standing mixer, add the flour, yeast, sugar and salt. Mix using a dough hook until combined. Then, add the oil and vanilla extract. Turn the mixer on again and then gradually pour your luke warm milk into the mixer, whilst it is mixing. Keep the dough mixing on a medium speed for 10 minutes.
After the 10 minutes, add your kneaded dough to an oiled bowl, cover (with a towel) and leave for one hour to prove.
Once your dough has proved, take it out onto a clean surface. Divide into 14 pieces and then form the pieces into balls with your hands. Place each circular doughnut onto a small square piece of baking paper. Place them onto a tray and leave them uncovered for a further 40 minutes to prove.
Place your 1 litre of oil into a saucepan on a medium heat. Once it is completely hot, start adding your doughnuts two at a time. Place the doughnut into the oil on the baking paper. After around 2 minutes (once the doughnut is golden brown) flip the doughnuts and fry on the other side. At this point, remove the baking paper carefully. Once golden on both sides, remove the doughnut from the oil and add them directly into the sugar- see following step.
Place your coating sugar into a bowl/plate so it is easy to roll the doughnut around in it. As soon as you remove the doughnut from the oil, place the doughnut onto the sugar and move it around, coating all sides. Then place the doughnuts on a plate. Repeat this process of frying and sugar coating until your 14 doughnuts are cooked!
Place your jam into a piping bag. Then, get a doughnut and make a hole in the middle of a doughnut, making some space in the centre for the jam. Then, using the piping bag, squeeze some jam into each doughnut. Don't overfill the doughnuts as the jam will spill out the edge! Repeat this process until all doughnuts are filled with jam.
Time to eat! I hope you love these doughnuts. Let me know how you get on in the comments section below or show me on instagram!