Thank you for your answer, Elsa. I actually managed to solve it. It must have been a miracle. So I guess it is not impossible, but it is still too hard. It should have at least 5-10 more moves. Thanks!
Level 729 of Candy Crush Saga is impossible to solve in only 20 moves. Even with a bunch of color bomb and special candy combinations you still cannot get the 4th ingredient. Please solve this as soon as possible, because it is obviously some sorth of error in the level and I am very close to deleting the game alltogether.