Whisk together the egg and milk.
Whisk together the flour, sugar , salt and cinnamon.
Add the cubed butter and rub in with your fingers until it all forms a coarse sand like consistency.
Mix in the egg-milk mixture until the dough just comes together.
Wrap in cling film and chill for atleast an hour and up to 2 days.
Divide the dough into two and roll the dough on a well floured surface until you get a rectangle about 12 cm by 24 cm . Meanwhile, preheat your oven to 180 C. Line a baking tray with parchment.
Apply some milk on top with a pastry brush or spoon. Mix the cinnamon and sugar for the filling together. Sprinkle half the cinnamon and sugar mixture generously.
Cut into strips about 1 cm thick.
Twist each strip from both ends gently. Set on your parchment lined baking sheet. You can place them close as they don't spread much. Repeat with all the dough.
Bake at 180 C for 20-25 minutes until golden brown.Cool completely.