Preheat your oven: to 180°C / 350-375°F / Gas Mark 4-5
Baking trays: line 2 flat baking trays with baking paper.
Butter: add the butter to a large mixing bowl and use electric beaters to cream. Then gradually pour the sugar in and continue to beat until it is consistently mixed in. Next add the vanilla essence and stir to ensure it is thoroughly combined.
Flour: next add the self-raising flour to the combined butter mixture. Again ensure that it is consistently mixed in with the other ingredients.
Sultanas: add the sultanas to the butter mixture and stir to gently mix them in.
Cornflakes: add the cornflakes to a zip lock bag, remove the air, seal and then use a spoon to bang the bag to slightly crush the cornflakes Note 5
Raw biscuits: next use a soup spoon or mini cookie scoop to portion out individual amounts of the biscuit batter and roll these into a cookie shape using the palms of your hands.
Cornflake coating: working 1 at a time drop the rolled cookie into the cornflakes and shake the pan, to allow the cornflakes to stick to the other side. Note 6
Baking tray: place the cornflake coated biscuits onto a baking tray, slightly spread apart from each other. Note 7
Oven bake: place the baking trays into the oven one by one (middle and lower racks). Then bake the biscuits for 16 mins until slightly golden brown Note 8
To serve: use oven mitts to remove the baking trays from the oven once the biscuits are done and rest them on a heatproof surface. After about 5 minutes use a flat turner to transfer the biscuits onto a cooling rack. Serve when ready.