Heat the oven to 190C/170C fan/gas 5. Mix together the oats, flour, salt, sugar and bicarbonate of soda. Add the butter, then rub together until it's the consistency of large breadcrumbs.

Gradually pour in 60-90ml water from a recently boiled kettle, stirring until it forms a thick dough.

Sprinkle some extra flour on a work surface and roll out the dough to about 1/2cm thickness. Use a cookie cutter to cut out about 16 rounds (the final number of oatcakes depends on the size of cutter you use).

Place the oatcakes on a baking tray and bake for 20 mins or until golden.