Preheat oven to 180ºC / 160ºC Fan / 350ºF / Gas 4
Cream the sugar, butter, golden syrup, egg and vanilla in a large bowl. This can be done in an electric mixer using the paddle attachment or by hand with a wooden spoon.
Sift together the plain and self-raising flour and add it into the creamed mixture. Mix thoroughly until combined then bring the dough together with your hands.
Knead the dough a couple of times to form a smooth ball but don't overwork it.
Wrap the dough in clingfilm and chill for around 30 minutes.
Once the dough has chilled, roll it out to a thickness of 4-5mm.
Cut into your desired biscuit shapes and transfer to a baking sheet leaving a 2cm space between each biscuit.
Bake in the preheated oven for 20 minutes. Bear in mind that smaller biscuits will bake quicker than larger ones.
The biscuits are cooked when they are browning at the edges and underneath.
Remove from the oven and leave to completely cool and firm up before you attempt to decorate.