To make your own buttermilk, add 45ml lemon juice into the milk, mix well and let it rest for 15 minutes. Then add in egg and mix well.

In a large bowl, mix flour, salt and baking soda together. Then add in cold butter, use your hands to crumble it. Add in buttermilk mixture, use your hands to form a dough. Shape the dough into round shape, flatten it a little.

Put some flour on parchment paper, then put the dough on it. Use a sharp knife to slash a cross on top. Pop in preheated oven at 200C, bake for 30-35 minutes or until fully cooked.