The magic mixer here will produce marmalade to cover the striped candies already present in the level.
The player is already given four striped candies, meaning that the player needs to create another eleven to pass the level. Of course, he/she can ignore the striped candies if colour bomb + striped candy combinations are created.
Five candy colours makes it somewhat easy to create special candies, but there are plenty of moves to make matches.
The order is worth 15,000 points, which is more than the one star target score.
The trick here is to avoid being seduced by the striped candies already present. The magic mixer will spawn marmalade to cover them at every move. Also, the magic mixer only does its business on the little square of cells around it - it encroaches no further than that so you may ignore it.
Instead, concentrate on making a colour bomb and lining up a striped candy beside it. The journey to that combination plus the combination itself should be sufficient or at least enough to enable you easily to succeed from there.