Place the starter, milk and 140g flour into a stand mixer bowl
Using a dough hook, beat until combined
Cover and leave to rest for 30 minutes
Add the remaining flour, fructose and salt and mix until a dough forms
Then knead on a low speed for 10 minutes
Tip the dough out onto a lightly floured surface and shape into a ball
Lightly oil the bowl, place the dough back into the bowl and turn to cover with the oil
Leave the dough seam side down, cover the bowl and set aside for 30 minutes
Pinch and fold the dough from the 12, 3, 6 and 9 o'clock positions then cover and set aside for 30 minutes
Repeat the pinch and fold action, cover and set aside for 60 minutes
Repeat the pinch and fold action then cover and set aside overnight to prove
Day 2:
Cut off a large piece of baking paper
Cut your butter into 4 equal slices and place into the middle of the baking paper in the shape of square (or as square as you can get it)
Cover with another sheet of baking paper and leave at room temperature to soften enough to roll
Tip your dough out onto a well floured surface and roll into a large rectangle, 4mm thick
Orient the dough with the long edge facing you
Measure the dough and work out the size of a square (i.e. half the size of the rectangle)
Roll your butter out to this size then place the butter into the middle of the dough, leaving a quarter edge flap on each side
Fold the flaps into the middle, then fold in half again (this is a book fold) and seal the edges
Cover with cling film and place into the fridge for 10 minutes to allow the butter to harden
Remove from the fridge and place the dough with the folds facing upwards onto a lightly floured surface and roll out into a large rectangle
Repeat the book fold procedure, seal the edges, cover with cling film and place into the fridge for 30 minutes
Remove from the fridge and place the dough with the folds facing upwards onto a lightly floured surface and roll out into a large rectangle
Repeat the book fold procedure, seal the edges, cover with cling film and place into the fridge for 30 minutes
Remove from the fridge and place the dough with the folds facing upwards onto a lightly floured surface and roll out into a large rectangle
Orient the dough with the short edge facing you then fold the top edge down, two thirds of the way
Fold the bottom edge up, to cover the top edge (this is a letter fold), and seal the edges
Cover with cling film and place into the fridge for a minimum of 2 hours
Remove from the fridge and place the dough with the folds facing up onto a lightly floured surface and roll out into a large rectangle, 40cm long and 20cm wide
Cut the rectangle into 4 squares of 10cm x 10cm, refrigerating the squares you are not working with to keep the butter cold
Cut each square along the diagonal to make 8 triangles
Place with the base facing the bottom and roll out the top two thirds of the dough
Roll up from the base to the tip, as tightly as possible then place onto a lined baking tray with the tip tucked under
Shape into a crescent as best you can and repeat until you have shaped all the dough
Cover with lightly oiled cling film and leave to prove overnight
Day 3:
Preheat your oven to 200° Celsius
Whisk the egg to completely slacken
Brush the top of each croissant with the egg then place into the oven
Bake for 15 minutes then remove from the oven
Place onto a wire rack straight away and serve warm