Mix 250 g flour, sugar, vanilla sugar, salt, baking powder and flaked almonds in a bowl. Add butter in flakes and 125 ml buttermilk, knead to a smooth dough with the dough hooks of the mixer.
Cover and chill for about 15 minutes. Then leave to rest at room temperature for about 30 minutes.
Preheat oven (electric cooker: 180 °C/circulating air: 160 °C/gas: see manufacturer). Knead dough well with floured hands. Roll out to a thickness of about 2 cm on a little flour. Cut out circles (approx. 6 cm Ø) with a round cookie cutter or a glass.
Place the scones on a baking tray lined with baking paper. Knead the rest of the dough again and process in the same way.
Brush scones with 2 tablespoons of buttermilk and bake in a hot oven for 12-14 minutes until golden brown. Remove and let cool slightly on a cake rack. The English prefer to eat the scones lukewarm with orange marmalade and clotted cream.
If you can't get the clotted cream here, you can use double cream as an alternative.