Ingredients
125g caster sugar
125g cornflour
2 cups plain flour
250g butter, melted

Method
Mix dry ingredients together. 
Mix in butter until well combined.
Press into ungreased 28cm x 18cm lamington pan and bake at 170C for 30mins.  
Remove from oven, cut into 24 squares, sprinkle evenly with caster sugar and prick each piece with a fork.
Return to oven for 15 mins. Cool in tin.  

Note: Don’t skip the final step of cutting and returning to the oven.