ok this is so simple if you have the Ultimate Pro from Crafters companion - follow the numbers of score marks and you will have this made in seconds!! :D Quick tutorial for those who have the Ultimate :)
Working with your A4 card placed against the handle score lines 1, 2 and 3 as shown in the below picture...
Turn the card 180 degrees and score line 4....
Move card along and score line 5.....
Turn card 90 degrees and score on the two closest lines to the handle......turn 180 degrees and score again so the opposite sides match.
Starting at the end where you only have 1 line scored, cut as shown below to make the lid.
The rest of the box is cut to create the sides and reinforcement pieces.
Turn over and attach double sided tape to the 2 inner small side reinforcements and along the 3 most outer scored sections.
The very bottom flap can be folded straight over.
The side reinforcements are folded in and the sides then folded up and over.
This is how it should look once fully assembled.
Decorate and use as you wish - i cut a acetate window into the top of mine and made little divider sections for inside....popped in 4 little mini cakes, fastened with ribbon and made a little gift tag :)