Preheat oven to 200°C
In a large bowl add the flour, baking powder, icing sugar and salt and mix it all.
Add the butter in small cubes or chunks (or you can grate it in) and rub the mixture together with your fingertips, or pulse in a food processor, until the butter is fully combined and the mixture resembles coarse breadcrumbs.
In a medium jug, beat the eggs, vanilla extract if using and buttermilk. Reserve about 2 tablespoons of mixture for the tops.
Add egg mixture to the flour and mix until just combined. The dough will be fairly sticky.
Tip the dough out onto a floured surface and pat it together as briefly as possible by hand to about 2.5cm thick. Be careful not to overwork it or knead it.
Using a 5cm round cookie cutter, cut out as many scones as you can. Make sure to push straight down and to not twist the cutter at all.
Gather the remaining dough and repeat until all the dough is used.
Arrange the scones close to each other on the prepared baking sheet. Brush the tops with the reserved egg mixture and bake for 10-12 minutes, or until golden brown.
Cool on a rack and then slice or break in half and serve warm with jam and whipped cream, or any other topping of your choice.