The key to good firecrackers (or indeed any edibles) is to to bind the THC content in the weed to the fat molecules in the cheese (or nutella, butter, etc).

You'll get far better results if you grind up the weed to a fine powder and mix it thoroughly with a small amount of butter/margarine, then put it in between the cheese, as it will help 'trap' THC in the cracker and stop excessive loss due to evaporation/vaporization.

15 minutes is WAY to short a time to extract anything like a decent percentage amount of the THC present, instead cook at a much lower temperature for longer. The results will be significantly stronger, with much smaller quantities of weed.

If you want a more detailed explanation click here:

http://boards.cannabis.com/recipes/1...ial-guide.html