Preheat the oven to 200°C (180°C fan-forced).
Mix the lemon juice and milk together to make buttermilk and set aside.
Sift the flour and baking powder into a large mixing bowl.
Rub the cubed butter into the flour until it resembles fine breadcrumbs.
Make a well in the centre of the flour mixture, pour in the buttermilk, amd mix together with a flat knife or a spatula.
Turn the dough out onto a lightly floured surface and knead until smooth.
Roll out the dough until it's about 2 cm thick, then cut with a small scone cutter or a small jar (5 cm diameter).
Spread the scones out on a lightly floured baking tray.
Cook the scones for 18-22 minutes until risen and golden.
Serve warm with honey cashew cream, sliced strawberries and mint leaves, or carrot, date and ginger jam.