Step by step method

1. Staple the corners of the beer box in place for reinforcement and then cover well with foil and grease with Stork Bake.
2. Whisk the eggs and castor sugar together for about 5 minutes until fluffy and light.
3. Add remaining ingredients and mix thoroughly to combine.
4. Pour mixture into the prepared box and bake at 180°C for 35 - 45 minutes until cooked.
5. Allow cake to cool completely.
6. Take out of box and remove foil. Place on a tray or cake board.
7. Trim the sides to make it even, if desired.
8. Ice the cake with vanilla icing (there will be icing left over).
9. Take this icing and divide into three or four colours of your choice.
10. Use small sandwich bags as piping bags for each colour.
11. Fill the bag with a little icing, pushing it to one of the bottom corners of the bag. Snip the end with scissors.
12. Divide your cake into equal squares. Use a knife to rule guidelines into the vanilla icing for you to work to.
13. Use the coloured icing to pipe coloured squares on the cake. Use the coloured icing to pipe a squiggle along the base of the cake.
14. Decorate with cake decorations or sweets of your choice.