• Preheat the oven to 160deg fan assisted. Have ready a couple of baking trays lined with a silicone baking sheet or baking parchment.
• Cream the butter, vanilla extract and sieved icing sugar together until well combined.
  200 g unsalted butter, 1 teaspoon Vanilla Extract, 100 g icing sugar
• Sieve the flour and cornflour together then add to the butter sugar mix. Mix everything together until you have a smooth firm dough.
  200 g plain flour, 100 g cornflour
• Depending on how many cookies you want to make, shape the dough into equal sized pieces. Place these onto the prepared baking sheets. TIP: If you want each cookie to be exact, weigh the dough first. Then divide into equal portions. I managed to make 20 individual biscuits and sandwiched 10 of them together with buttercream and decorated the rest.
• Using a fork, gently press down each ball of dough, just a little. These cookies retain their shape and will not spread like some cookies do. If you want a flatter biscuit, press them down a little more.
• Bake in the centre of the oven for 15 - 20 mins or until baked. While still feeling soft and pale looking, the cookies will firm up once cooled so try not to remove them from the baking trays until completely cooled down and set.

Making the Buttercream

• Mix together the butter, icing sugar and Vanilla extract until light and fluffy. The lighter the colour the better your colours will be when you add the food colouring.
  300 g Icing sugar, 150 g Unsalted butter, 1 teaspoon Vanilla extract
• Divide the buttercream into two dishes add drops of gel food colouring according to how strong you want them. Mix thoroughly until the colour has blended in evenly.
  Gel Food colouring orange and black
• Place the Buttercream into individual piping bags fitted with your favour nozzles.
• This is the fun bit. To make Monster Cookies, pipe swirls of buttercream around the edge of one of the cookies, place another on top. Add a couple of eyes.
  Edible Eye decorations
• Decorate the rest of the Cookies using the coloured buttercream and edible eyes.