Level 2373 is the thirteenth level in Cupcake Clinic and the 132nd mixed mode level (130th jelly-ingredients). To pass this level, you must clear jdouble single and 57 double jelly squares in 30 moves or fewer.
When you complete the level, Sugar Crush is activated and will score you additional points.
This is used to be the second mixed level without blockers, the first being level 2174. This one didn't have mystery candies, however, so it would be literally impossible for any blockers to appear in the level.
After the buff, it is no longer true since it has multi-layered frosting on board.