I use the first explosion to remove the leftmost three pieces of dark chocolate from the strangely shaped dark block at the bottom, along with two pieces of wall to the left of it.
The second explosion is directly to the right of the t-junction where the bear is trapped. It's also used to shape the largest dark chocolate block so that it can be connected through the resulting gap.
Great solution, Lexaloffle. I was trying to resolve this level using pieces on the left side, more like Gray's solution I think, and was getting trapped every time. Even now that I know that there's a solution on the left side I can't do it. Gray, if you would be very kind, post me your solution too! Thank you both! (sorry for my english, I've got to improve it, I know...)
I guess there's no point in holding back the record solutions forever. I'm posting this one  since there hasn't been anything new on the list in the last month and we promised to post solutions on request.
Wow, this has been very enlightening. It took me ages to solve this room, and yet there are so many ways to solve it. I kept attacking the left, and failing where Gray succeeded; my own 24-move focused on the right: