Level 257 is the twelfth level in Delicious Drifts and the forty-fourth candy order level. To pass this level, you must collect 2 wrapped candy + striped candy combinations, 1 striped candy + color bomb combination, and 2 striped candy + striped candy combinations and score at least 25,000 points in 35 moves or fewer. If you have extra moves left in this level, Sugar Crush will activate striped candies and score you additional points.
The most difficult part of this level is the hidden timer bomb. If you handle those, then it can be easy to cross the level. The problem is that there will be so many chances of matching two combos together but you will find if you match one type combo, then other chances of matching the combos will be wasted due to the effects of the first combo you matched.
First open up all the bags and hope you have one of the orders all set up and ready to go, and that there are no candy bombs or chocolate that you won't be able to reach. After that, work on the combos one at a time--they should not be unfamiliar to you by now, and activating one is likely to mess up your setup for others.