This level may be extremely difficult. Because of the constant flow of licorice it is nearly impossible to reach the chocolate without the colour bomb + colour bomb combination. Said combination is really tough to make on such a board, even with only four colours.
The order is worth 3,000 points. Hence, an additional 7,000 points is required to earn one star.
The easiest way to complete this level is to make two colour bombs side by side and mix them. With only four candy colours, it's not hard to make colour bombs, but there are also many cascades that can set off your saved colour bombs. If you have enough boosters, you can start the game with a colour bomb and make another one next to it using free switches if necessary (see the first video).
Another way to pass this level is to break through the liquorice "wall" and make matches in the bottom area to collect the required pieces of chocolate. This could sound like a mission impossible because liquorice swirls spawn every move, but it's not. There are 9 swirls in the beginning but the board spawns 8 swirls if possible, which means that there will always be a break in the wall once you start hitting it. Try to use any special candy that you have to remove chocolate squares, like vertical striped candies in the column without liquorice swirls or colour bombs to clear the candies near chocolate. This strategy is shown in the second video.